Tag Archives: extraction

Enforcement of Intellectual Property Rights for Cannabis Put to Test in Federal Court

By Dr. Travis Bliss
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A number of cannabis businesses have pursued federal intellectual property protection for their cannabis-related innovations, such as U.S. patents that protect novel cannabis plant varieties, growing methods, extraction methods, etc. Enforcement of such federal IP rights requires that the IP owner file suit in federal court asserting those rights against another cannabis company. However, given that cannabis is still illegal under federal law, the industry is uncertain about whether a federal court will actually enforce cannabis-related IP rights. This question might be answered soon.

The potential impact of this case goes way beyond the two parties involvedOrochem Technologies, Inc. filed a lawsuit in federal court in the Northern District of Illinois on September 27, 2017, seeking to assert and enforce trade secret rights against Whole Hemp Company, LLC. According to the complaint, Orochem is a biotechnology company that uses proprietary separation methods to extract and purify cannabidiol (CBD) from industrial hemp in a way that produces a solvent-free and THC-free CBD product in commercially viable quantities.

The complaint goes on to say that Whole Hemp Company, which does business as Folium Biosciences, is a producer of CBD from industrial hemp and that Folium engaged Orochem to produce a THC-free CBD product for it. According to the allegations in the complaint, Folium used that engagement to gain access to and discover the details of Orochem’s trade secret method of extracting CBD so that it could take the process and use it at their facility.

The complaint provides a detailed story of the events that allegedly transpired, which eventually led to an Orochem employee with knowledge of the Orochem process leaving and secretly starting to work for Folium, where he allegedly helped Folium establish a CBD production line that uses Orochem’s trade secret process. When Orochem learned of these alleged transgressions, it filed the lawsuit, claiming that Folium (and the specific employee) had misappropriated its trade secret processes for extracting and purifying CBD.

While the particular facts of this case are both interesting and instructive for companies operating in the cannabis industry, the potential impact of this case goes way beyond the two parties involved.

If it moves forward, this case will likely provide a first glimpse into the willingness of federal courts to enforce IP rights that relate to cannabis. Orochem is asserting a violation of federal IP rights established under the federal Defend Trade Secrets Act (DTSA) and is asserting those rights in federal district court. As a result, the federal district court judge will first need to decide whether a federal court can enforce federal IP rights when the underlying intellectual property relates to cannabis.

If the court ultimately enforces these federal trade secret rights, it could be a strong indication that other federal IP rights, such as patent rights, would also be enforceable in federal court. Since the outcome of this case will likely have a far reaching and long lasting impact on how the cannabis industry approaches and deals with intellectual property, it’s a case worth watching.

JCanna Boot Camp Educates Portland Attendees

By Aaron G. Biros
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On Monday, August 28th, attendees of the Cannabis Science Conference descended on Portland, Oregon for a week of educational talks, networking and studying the science of cannabis. On Monday, Chalice Farms, an extracts and infused products company, hosted the full-day JCanna Boot Camp focused on a deep dive behind the scenes of a cannabis production facility. The Cannabis Science Conference, hosted by Josh Crossney, founder of JCanna, takes place August 28th to 30th.

Attendees touring an extraction setup

Attendees were split into five groups where they listened to a variety of educational sessions and toured the facility. A track focused on cultivation, led by Autumn Karcey, president of Cultivo, Inc., detailed all things facility design for cannabis cultivation, including an in-depth look at sanitation and safety. For example, Karcey discussed HVAC cleanliness, floor-to-ceiling sanitation and the hazards associated with negative pressure. These principles, while applicable to most cultivating facilities, applies particularly to commercial-scale grows in a pharmaceutical setting.

Sandy Mangan and Tristan DeBona demonstrating the grinding technique for sample prep

During one session, Sandy Mangan, accounts manager at SPEX Sample Prep and Tristan DeBona, sales specialist at SPEX Sample Prep, demonstrated the basics of sample preparation for detecting pesticides in infused products, such as gummies. That required using their GenoGrinder and FreezerMill, which uses liquid nitrogen to make gummies brittle, then pulverizing them to a powder-like substance that is more conducive for a QuEChERS preparation.

Joe Konschnik and Susan Steinike demonstrate the QuEChERS method

Joe Konschnik, business development manager at Restek, Susan Steinike, product-marketing manager at Restek and Justin Steimling, an analytical chemist at Restek, gave a demonstration of a full QuEChERS extraction of a cannabis sample for pesticide analysis, with attendees participating to learn the basics of sample preparation for these types of tests.

Following those were some other notable talks, including a tour of the extraction instruments and equipment at Chalice Farms, a look inside their commercial kitchen and a discussion of edibles and product formulation. Dr. Uma Dhanabalan, founder of Uplifting Health and Wellness, a physician with over 30 years of experience in research and patient care, led a discussion of physician participation, patient education and drug delivery mechanisms.

Amanda Rigdon, Emerald Scientific, showing some complex matrices in cannabis products

Amanda Rigdon, chief technical officer of Emerald Scientific, offered a demonstration of easy and adaptable sample preparation techniques for potency testing of infused product matrices. Rigdon showed attendees of the boot camp how wildly diverse cannabis products are and how challenging it can be for labs to test them.

The JCanna Canna Boot Camp is a good example of an educational event catered to the cannabis industry that offers real, hands-on experience and actionable advice. Before the two-day conference this week, the boot camp provided a bird’s eye view for attendees of the science of cannabis.

Cannabis-Infused Beer Goes Mainstream

By Aaron G. Biros
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Lagunitas Brewing today unveiled a new beer infused with cannabis, making it the first large national brewery to experiment with cannabis. Lagunitas, now owned by Heineken, announced the launch of their “Supercritical Ale,” an IPA brewed with terpenes extracted from cannabis.

The brewery chose to partner with AbsoluteXtracts and CannaCraft, based in California, for their cannabis extract and will use hops from Yakima, Washington. “We’ve long known about the close connection between cannabis and hops,” reads their website. “Now Lagunitas is excited to partner with a like-minded neighbor in Sonoma County, AbsoluteXtracts, to close the gap further with tandem innovations on the topic.” Hops and cannabis belong in the same taxonomic family, Cannabinaceae, and they also have a number of physical similarities, which helps explain the “close connection” they are referring to. The website says the beer will only be available in California—for now. According to Fortune Magazine, the terpenes come from two strains, Blue Dream and Girl Scout Cookies (known as GSC in some states).

The name “Supercritical” comes from the state that carbon dioxide is best used as a solvent for extracting compounds from plants. Terpenes are responsible for the aromatic properties of plants, giving hops the piney and citrusy flavors that come in IPAs, and giving cannabis the same flavors and smells as well. Limonene, for example, is a cyclic terpene molecule that gives us a citrusy smell and flavor.

Coalition brewing Co.’s Two Flowers IPA

They’re not the first brewery to experiment with cannabis-infused beer; smaller craft breweries have been doing it for some time now. Coalition Brewing Co., based in Portland, Oregon, sells a cannabis-infused beer called Two Flowers IPA, with 3mg of cannabidiol (CBD) in a 12oz glass. Dad and Dudes Breweria, based in Aurora, Colorado, also put out a CBD-infused beer last year, called General Washington’s Secret Stash. According to Westword, Dad and Dudes was the first brewery to receive federal approval for a CBD-infused beer, but since the DEA declared cannabis oil illegal last winter, the Alcohol and Tobacco Tax and Trade Bureau rescinded their approval.

The common denominator between these three beers is that none of them contain THC, the popular psychoactive ingredient in cannabis. Perhaps Lagunitas is taking a safer approach with regard to federal legality by only using terpenes, not CBD, and only offering it in state. Coalition’s Two Flowers IPA is also only available in Oregon, but does, however, contain CBD. Check out the video on Lagunitas’ Supercritical Ale below.

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Clear vs. Pure: How Fallacies and Ignorance of Extraction Misrepresent the Cannabis Flower

By Dr. Markus Roggen
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Demand for cannabis extracts, in particular vaping products, is at an all-time high. People want good oil, and they want to know something about the quality of it. It is therefore time to take a step back and consider the process from plant to cartridge. What is the current industry standard for cannabis extraction, what constitutes quality and where might we need to make some adjustments?

Right now, “clear” oil is hot. Customers have been led to believe that a pale gold extract is synonymous with the best possible cannabis concentrate, which is not necessarily the case. Producing a 95% pure THC extract with a translucent appearance is neither a great scientific feat nor a good representation of the whole cannabis flower. Moreover, it runs counter to the current trend of all-natural, non-processed foods and wellness products.

“My carrots are organic and fresh from the farmers market, my drink has no artificial sweeteners and my honey is raw, but my cannabis oil has undergone a dozen steps to look clear and still contains butane.”Cannabis is a fascinating plant. It is the basis of our livelihood, but more importantly, it enhances the quality of life for patients. The cannabis plant offers a plethora of medicinally interesting compounds. THC, CBD and terpenes are the most popular, but there are so many more. As of the most recent count, there are 146 known cannabinoids1. Cannabinoids are a group of structurally similar molecules2, including THC and CBD, many of which have shown biological activity3.

Then there are terpenes. These are the smaller molecules that give cannabis its distinct smell and flavor, over 200 of which have been identified in cannabis4. But wait, there’s more. The cannabis plant also produces countless other metabolites: flavonoids, alkaloids, phenols and amides5. All these components mixed together give the often-cited entourage effect6,7.

Current industry standards for cannabis oil extraction and purification stand in marked contrast to the complexity of the plant’s components. Due to an unsophisticated understanding of the extraction process and its underlying chemistry, cannabis oil manufacturers frequently produce oil of low quality with high levels of contamination. This necessitates further purifications and clean up steps that remove such contaminants unfortunately along with beneficial minor plant compounds. If one purifies an extract to a clear THC oil, one cannot also offer the full spectrum of cannabinoids, terpenes and other components. Additionally, claiming purities around 95% THC and being proud of it, makes any self-respecting organic chemist cringe8.

Precise control of extraction conditions leads to variable, customized concentrates. THC-A crumble, terpene-rich vape oil, THC sap (from left to right).

The labor-intensive, multi-step extraction process is also contrary to “the clean-label food trend”, which “has gone fully mainstream”9. Exposing the cannabis flower and oil to at least half a dozen processing steps violates consumer’s desire for clean medicine. Furthermore, the current practice of calling supercritical-CO2-extracted oils solvent-less violates basic scientific principles. Firstly, CO2 is used as a solvent, and secondly, if ethanol is used to winterize10, this would introduce another solvent to the cannabis oil.

We should reconsider our current extraction practices. We can offer cannabis extracts that are free of harmful solvents and pesticides, give a better, if not full, representation of the cannabis plant and meet the patients’ desire for clean medicine. Realizing extracts as the growth-driver they are11 will make us use better, fresher starting materials12. Understanding the underlying science and learning about the extraction processes will allow us to fine-tune the process to the point that we target extract customized cannabis concentrates13. Those, in turn, will not require additional multi-step purification processes, that destroys the basis of the entourage effect.

The cannabis industry needs to invest and educate. Better extracts are the result of knowledgeable, skilled people using precise instruments. Backroom extraction with a PVC pipe and a lighter should be horror stories of the past. And only when the patient knows how their medicine is made can they make educated choices. Through knowledge, patients will understand why quality has its price.

In short, over-processing to make clear oil violates both the plant’s complexity and consumers’ desires. Let us strive for pure extracts, not clear. Our patients deserve it.


[1] Prof. Meiri; lecture at MedCann 2017

[2] ElSohly, Slade, Life Sciences 2005, 539

[3] Whiting, et. al., JAMA. 2015, 2456

[4] Andre, Hausman, Guerriero, Frontiers in Plant Science 2016, 19

[5] Hazekamp, et. al., Chemistry of Cannabis Chapter 3.24; 2010 Elsevier Ltd.

[6] Ben-Shabat, et al.; Eur J Pharmacol. 1998, 23

[7] Mechoulam, et al.; Nat Prod Rep. 1999, 131

[8] Medical and Research Grade chemicals are generally of purities exceeding 99.9%

[9] Bomgardner, Chemical & Engineering News 2017, 20

[10] Winterization is the industry term for what is correctly referred to as precipitation.

[11] Year-over changes to market shares in Colorado 2015 to 2016: Concentrates 15% to 23%; Flower 65% to 57%, BDS Analytics, Marijuana Market Executive Report, 2017

[12] Further reading about the whole extraction process: B. Grauerholz, M. Roggen; Terpene and Testing Magazine, July/Aug. 2017

[13] Further reading about optimizing CO2 extraction: M. Roggen; Terpene and Testing Magazine, May/June 2017, 35

PA Announces First 12 Grower/Processor Permit Winners

By Aaron G. Biros
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The Pennsylvania Department of Health announced today the first 12 winners of growing and processing permits for the state’s medical cannabis program. At first glance, it appears those who won the permits have teams with experience in successful cannabis operations elsewhere in the country. The permit winners now have six months to become operational, according to a press release.

The list of permit winners by region

According to that press release, John Collins, director of the Pennsylvania Office of Medical Marijuana, received 457 applications in total, with 177 prospective grower/processors and 280 for dispensaries. “With today’s announcement, we remain on track to fulfill the Wolf Administration’s commitment to deliver medical marijuana to patients in 2018,” says Collins. “The applications from the entities receiving permits were objectively reviewed by an evaluation team made up of members from across commonwealth agencies.”

A sample score card for the applicants

In the populous Southeast region of Pennsylvania, grower/processor permits were awarded to Prime Wellness of Pennsylvania, LLC, and Franklin Labs, LLC. Prime Wellness is a Connecticut-based enterprise. According to Steve Schain, Esq., attorney at the Hoban Law Group, Franklin Labs includes team members from Garden State Dispensary, a successful medical cannabis operation in New Jersey.

Two of the businesses that won permits are actually from Illinois, not Pennsylvania. GTI Pennsylvania, LLC (Green Thumb Industries), has a strong presence in Illinois and Nevada. AES Compassionate Care LLC lists their business state as Illinois as well.

Steve Schain, Esq. practicing at the Hoban law Group

“Based on the first phase award of grower/processor licensees both the strength and weakness of Pennsylvania’s program has been highlighted,” says Schain. “Many licensee recipients are affiliated with existing national marijuana-related businesses with excellent track records for operating in a transparent, compliant and profitable manner.” The applications were rated on a scorecard out of 1,000 points. “Unfortunately missing from this initial phase license winners are purely regional enterprises who may have been unable to compete with national concerns’ resources and checkbooks.” According to Schain, some of the more significant areas on the scorecard reflect a diversity plan, community impact statement, business history and capacity to operate, capital requirements and operational timetable. Capital requirements are the applicants’ demonstrable financial resources comprised of at least $2 million in capital and $500,000 in cash. All of the growers are required to grow indoors, not in a greenhouse or on an outdoor farm.

There is also a ten-day appeals process for scorecards that will undoubtedly be utilized by companies that were not successful in their bids. The next phase, according to Schain, of Pennsylvania’s Medical Marijuana Program regards “Clininical Registrants” in which grow/processor and dispensary licensure will be awarded to eight applicants, which, if able to satisfy requirements including demonstrating $15 million in capital, will be authorized to open up to six dispensary locations.

 

Implementing a HACCP Plan in Cannabis Processing

By Aaron G. Biros
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Hazard analysis and critical control points (HACCP) is a robust management system that identifies and addresses any risk to safety throughout production. Originally designed for food safety through the entire supply chain, the risk assessment scheme can ensure extra steps are taken to prevent contamination.

The FDA as well as the Food Safety and Inspection Service currently require HACCP plans in a variety of food markets, including high-risk foods like poultry that are particularly susceptible to pathogenic contamination. As California and other states develop and implement regulations with rigorous safety requirements, cannabis cultivators, extractors and infused product manufacturers can look to HACCP for guidance on bolstering their quality controls. Wikipedia actually has a very helpful summary of the terms referenced and discussed here.

Dr. Markus Roggen, vice president of extraction

The HACCP system consists of six steps, the first of which being a hazard analysis. For Dr. Markus Roggen, vice president of extraction at Outco, a medical cannabis producer in Southern California, one of their hazard analyses takes place at the drying and curing stage. “When we get our flower from harvest, we have to think about the drying and curing process, where mold and bacteria can spoil our harvest,” says Dr. Roggen. “That is the hazard we have to deal with.” So for Dr. Roggen and his team, the hazard they identified is the potential for mold and bacteria growth during the drying and curing process.

The next step in the HACCP system is to identify a critical control point. “Correct drying of the flower will prevent any contamination from mold or bacteria, which is a control point identified,” says Dr. Roggen. “We also have to prevent contamination from the staff; it has to be the correct environment for the process.” That might include things like wearing gloves, protective clothing and hand washing. Once a control point is identified, the third step in the process is to develop a critical limit for those control points.

A critical limit for any given control point could be a maximum or minimum threshold before contamination is possible, reducing the hazard’s risk. “When we establish the critical limit, we know that water activity below 0.65 will prevent any mold growth so that is our critical limit, we have to reach that number,” says Dr. Roggen. The fourth step is monitoring critical control points. For food manufacturers and processors, they are required to identify how they monitor those control points in a written HACCP plan. For Dr. Roggen’s team, this means using a water activity meter. “If we establish the critical control point monitoring, water activity is taken throughout the drying process, as well as before and after the cure,” says Dr. Roggen. “As long as we get to that number quickly and stay below that number, we can control that point and prevent mold and bacteria growth.”

One of the cultivation facilities at Outco

When monitoring is established and if the critical limit is ever exceeded, there needs to be a corrective action, which is the fifth step in a HACCP plan. In Dr. Roggen’s case, that would mean they need a corrective action ready for when water activity goes above 0.65. “If we don’t have the right water activity, we just continue drying, so this example is pretty simple,” says Dr. Roggen. “Normal harvest is 7 days drying, if it is not dry enough, we take longer to prevent mold or bacteria growth.”

The sixth step is establishing procedures to ensure the whole system works. In food safety, this often means requiring process validation. “We have to double check that our procedure and protocols work,” says Dr. Roggen. “Checking for water activity is only a passive way of testing it, so we send our material to an outside testing lab to check for mold or bacteria so that if our protocols don’t work, we can catch those problems in the data and correct them.” They introduced weekly meetings where the extraction and cultivation teams get together to discuss the processes. Dr. Roggen says those meetings have been one of the most effective tools in the entire system.

Dr. Roggen’s team identified worker safety as a potential hazard

The final step in the process is to keep records. This can be as simple as keeping a written HACCP plan on hand, but should include keeping data logs and documenting procedures throughout production. For Dr. Roggen’s team, they log drying times, product weight and lab tests for every batch. Using all of those steps, Dr. Roggen and his team might continue to update their HACCP plans when they encounter a newly identified hazard. While this example is simplistic, the conceptual framework of a HACCP plan can help detect and solve much more complex problems. For another example, Dr. Roggen takes us into his extraction process.

Dr. Roggen’s team, on the extraction side of the business, uses a HACCP plan not just for preventing contamination, but for protecting worker safety as well. “We are always thinking about making the best product, but I have to look out for my team,” says Dr. Roggen. “The health risk to staff in extraction processes is absolutely a hazard.” They use carbon dioxide to extract oil, which carries a good deal of risks as well. “So when we look at our critical control points we need to regularly maintain and clean the extractor and we schedule for that,” says Dr. Roggen.

Gloves, protective clothing, eyewear and respirators are required for workers in the extraction process.

“My team needs respirators, protective clothing, eyewear and gloves to prevent contamination of material, but also to protect the worker from solvents, machine oil and CO2 in the room.” That health risk means they try and stay under legal limits set by the government, which is a critical limit of 3,000 ppm of carbon dioxide in the environment. “We monitor the CO2 levels with our instruments and that is particularly important whenever the extractor is opened.” Other than when it is being opened, Dr. Roggen, notes, the extractor stays locked, which is an important worker safety protocol.

The obvious corrective action for them is to have workers leave the room whenever carbon dioxide levels exceed that critical limit. “We just wait until the levels are back to normal and then continue operation,” says Dr. Roggen. “We updated our ventilation system, but if it still happens they leave the room.” They utilize a sort of double check here- the buddy system. “I took these rules from the chemistry lab; we always have two operators working on the machine on the same time, never anyone working alone.” That buddy check also requires they check each other for protective gear. “Just like in rock climbing or mountain biking, it is important to make sure your partner is safe.” He says they don’t keep records for employees wearing protective gear, but they do have an incident report system. “If any sort of incident takes place, we look at what happened, how could we have prevented it and what we could change,” says Dr. Roggen.

He says they have been utilizing some of these principles for a while; it just wasn’t until recently that they started thinking in terms of the HACCP conceptual framework. While some of those steps in the process seem obvious, and it is very likely that many cannabis processors already utilize them in their standard operating procedures and quality controls, utilizing the HACCP scheme can help provide structure and additional safeguards in production.

Israeli Cannabis Brand Tikun Olam Expands to US

By Aaron G. Biros
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Tikun Olam is a Jewish concept that addresses social policy, promoting acts of kindness to better society. In Hebrew, it literally means, “repair of the world.” The company by the same name, Tikun Olam Ltd, and now in the United States as T.O. Global LLC, was the first medical cannabis provider in Israel back in 2007. Working with patients, doctors and nurses in clinical trials, they developed 16 strains over the last decade that target alleviating symptoms of specific ailments.

Tel Aviv, Israel, where Tikun Olam has a dispensary

In November 2016, they launched their United States brand, Tikun, in the Delaware medical cannabis program with their partner, First State Compassion Center, a vertically integrated business of cultivation, extraction and retail in Wilmington. After the success of their pilot program, Tikun announced their expansion into the Nevada market with their licensed partner, CW Nevada LLC. Tikun is leveraging its experience with clinical trials and medical research to launch a line of cannabis products focused on health and wellness in the United States. According to Stephan Gardner, chief marketing officer at Tikun Olam, they have the largest collection of medical cannabis data in the world. “Tikun Olam started out as a non-profit, working to bring medication to patients in Israel,” says Gardner. “Opening nursing clinics gave us a tremendous amount of knowledge and data to work on the efficacy of strains developed specifically for targeting symptoms associated with certain conditions.” For example, their strain, Avidekel, was developed years ago as the first high-CBD strain ever created.

cannabis close up
The strain Avidekel being grown in Israel.

In a single-strain extraction, Avidekel has been used to successfully mitigate the symptoms associated with neurological conditions, like epilepsy in children, and they have the data to demonstrate that efficacy. “The American market needs some sort of guidance on how these cannabinoid and terpene profiles in certain strains can truly assist patients,” says Gardner. “We have been tracking and monitoring our patients with clinical and observational data in one, six month and annual follow ups, which are data we can use to guide the needs in the US.”

Their expansion strategy focuses heavily on the health benefits of their strains, not necessarily targeting the recreational market. “As a wellness brand in Nevada, we are positioned to work first and foremost in the medical market,” says Gardner. “Our wellness brand can cater to people looking for homeopathic remedies for things like inflammation issues, sleep disorders or pain relief for example,” says Gardner. “You will not see us going out there catering to the truly recreational market; the benefits of what our strains can do is marketed from a wellness perspective.” A cannabis product with high-THC percentages is not unique, says Gardner, but their approach using the entourage effect and proven delivery mechanisms is. “While higher THC might appeal to the rec market, that is not exactly how we will promote and position ourselves,” says Gardner. “We want to be a dominant force in the wellness market.”

Best practices include quality control protocols

That effort requires working within the US regulatory framework, which can be quite complicated compared to their experience in Israel. “We have to understand the Israeli market and American market are completely different due to the regulatory regimes each country has in place,” says Gardner. “We understand the efficacy of these products and want to educate customers on how they might benefit. We don’t want to make claims looking to cure anything, but we found in our data that a lot of symptoms in different ailments, like cancer, PTSD, Crohn’s disease, colitis and IBS, can be alleviated by strains we developed.” In addition to the medical research, they are bringing their intellectual property, cultivation methodologies, evidence-based scientific collaboration and best practices to their partners in the US.

So for Tikun’s expansion in the US, they want to get a medical dialogue going. “We will launch a fully accredited AMA [American Medical Association] program, educating medical practitioners, giving the doctors the understanding of the capabilities of cannabis and what our strains can do,” says Gardner. “We will also share our observational data with doctors so they can work to better guide their patients.” Right now, they are working on the education platform in their pilot program in Delaware. “We plan on using that as a platform to expand into other markets like Nevada,” says Gardner. “And we will be launching the Tikun brand in the Washington market this summer.” Based on the high demand they saw in the Delaware market, Gardner says they plan to launch six unique strains in the American market, with delivery mechanisms like vape products, tinctures, lozenges and topicals in addition to dried flower.

dry cannabis plants
Rows of cannabis plants drying and curing before processing.

While Tikun expands throughout the United States, their sights are set on global expansion, living up to the true meaning of the concept Tikun Olam. They entered a strategic partnership with a licensed producer based in Toronto, bringing their strains, including Avidekel, to the Canadian market. The company they are partnering with, MedReleaf, recently filed for an initial public offering (IPO) on the Toronto stock exchange. Tikun Olam is actively seeking to expand in other parts of the world as well.

Chris English
The Practical Chemist

Accurate Detection of Residual Solvents in Cannabis Concentrates

By Chris English
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Chris English

Edibles and vape pens are rapidly becoming a sizable portion of the cannabis industry as various methods of consumption popularize beyond just smoking dried flower. These products are produced using cannabis concentrates, which come in the form of oils, waxes or shatter (figure 1). Once the cannabinoids and terpenes are removed from the plant material using solvents, the solvent is evaporated leaving behind the product. Extraction solvents are difficult to remove in the low percent range so the final product is tested to ensure leftover solvents are at safe levels. While carbon dioxide and butane are most commonly used, consumer concern over other more toxic residual solvents has led to regulation of acceptable limits. For instance, in Colorado the Department of Public Health and Environment (CDPHE) updated the state’s acceptable limits of residual solvents on January 1st, 2017.

Headspace Analysis

Figure 1: Shatter can be melted and dissolved in a high molecular weight solvent for headspace analysis (HS). Photo Courtesy of Cal-Green Solutions.

Since the most suitable solvents are volatile, these compounds are not amenable to HPLC methods and are best suited to gas chromatography (GC) using a thick stationary phase capable of adequate retention and resolution of butanes from other target compounds. Headspace (HS) is the most common analytical technique for efficiently removing the residual solvents from the complex cannabis extract matrix. Concentrates are weighed out into a headspace vial and are dissolved in a high molecular weight solvent such as dimethylformamide (DMF) or 1,3-dimethyl-3-imidazolidinone (DMI). The sealed headspace vial is heated until a stable equilibrium between the gas phase and the liquid phase occurs inside the vial. One milliliter of gas is transferred from the vial to the gas chromatograph for analysis. Another approach is full evaporation technique (FET), which involves a small amount of sample sealed in a headspace vial creating a single-phase gas system. More work is required to validate this technique as a quantitative method.

Gas Chromatographic Detectors

The flame ionization detector (FID) is selective because it only responds to materials that ionize in an air/hydrogen flame, however, this condition covers a broad range of compounds. When an organic compound enters the flame; the large increase in ions produced is measured as a positive signal. Since the response is proportional to the number of carbon atoms introduced into the flame, an FID is considered a quantitative counter of carbon atoms burned. There are a variety of advantages to using this detector such as, ease of use, stability, and the largest linear dynamic range of the commonly available GC detectors. The FID covers a calibration of nearly 5 orders of magnitude. FIDs are inexpensive to purchase and to operate. Maintenance is generally no more complex than changing jets and ensuring proper gas flows to the detector. Because of the stability of this detector internal standards are not required and sensitivity is adequate for meeting the acceptable reporting limits. However, FID is unable to confirm compounds and identification is only based on retention time. Early eluting analytes have a higher probability of interferences from matrix (Figure 2).

Figure 2: Resolution of early eluting compounds by headspace – flame ionization detection (HS-FID). Chromatogram Courtesy of Trace Analytics.

Mass Spectrometry (MS) provides unique spectral information for accurately identifying components eluting from the capillary column. As a compound exits the column it collides with high-energy electrons destabilizing the valence shell electrons of the analyte and it is broken into structurally significant charged fragments. These fragments are separated by their mass-to-charge ratios in the analyzer to produce a spectral pattern unique to the compound. To confirm the identity of the compound the spectral fingerprint is matched to a library of known spectra. Using the spectral patterns the appropriate masses for quantification can be chosen. Compounds with higher molecular weight fragments are easier to detect and identify for instance benzene (m/z 78), toluene (m/z 91) and the xylenes (m/z 106), whereas low mass fragments such as propane (m/z 29), methanol (m/z 31) and butane (m/z 43) are more difficult and may elute with matrix that matches these ions. Several disadvantages of mass spectrometers are the cost of equipment, cost to operate and complexity. In addition, these detectors are less stable and require an internal standard and have a limited dynamic range, which can lead to compound saturation.

Regardless of your method of detection, optimized HS and GC conditions are essential to properly resolve your target analytes and achieve the required detection limits. While MS may differentiate overlapping peaks the chances of interference of low molecular weight fragments necessitates resolution of target analytes chromatographically. FID requires excellent resolution for accurate identification and quantification.

Implementing Real Science in Cultivation and Extraction

By Aaron G. Biros
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Formed in 2015, Outco is a vertically integrated, licensed producer of medical cannabis in Southern California. Outco manages Outliers Collective, the first licensed dispensary continually operating in San Diego County. They operate the first licensed cultivation on Native American land in Southern California, the first cultivation building permit in Southern California and the first licensed extraction facility in San Diego County. Outco is on track to be the largest licensed producer of medical cannabis in Southern California.

Lincoln Fish, co-founder and chief executive officer of Outco
Lincoln Fish, co-founder and chief executive officer of Outco

The company prides themselves on attention to detail; the well versed team implements real science in their cultivation and extraction processes. Lincoln Fish, co-founder and chief executive officer of Outco, has more than 30 years of experience as an entrepreneur. Before entering the cannabis industry, Linc started and sold companies in the healthcare technology and nutraceutical spaces.

With construction underway at new facilities, Outco is anticipating an expanding market and higher demand.
With construction underway at new facilities, Outco is anticipating an expanding market and higher demand.

Fish’s experience with FDA regulations in nutraceuticals prepared him for running a business in such a tumultuous, highly regulated environment like cannabis. “One thing I took from the nutraceutical industry is how to present products to consumers and letting them know it is safe, effective and consistent,” says Fish. He says he noticed a serious lack of consistency in products. They tested 25 different vape cartridges, with their own oil, to find a consistent product they can use and know that consumers will safely and consistently get the same results. “There is a lot of room for more professionals and a lot of room for more science,” says Fish. “We try to position ourselves in a way that is consistent with where we think policy will go so we are very careful with recommendations from a scientific standpoint, patient information and product safety.”

Starting at a seed or cutting, plants are grown with the protection of biological control agents
Starting at a seed or cutting, plants are grown with the protection of biological control agents

According to Fish, they currently distribute cannabis products to about 75 licensed dispensaries in Orange County, San Diego and Los Angeles. With construction underway at their cultivation facility on Native American land, Fish says they plan to generate roughly 2600 pounds of cannabis each month. Gearing up for that in addition to the expanding recreational market requires some planning in advance, says Fish. Part of that plan is making sure quality controls are in place to keep consistency in the product quality and dosage. They are also actively seeking to open their distribution channels further.

One of the cultivation facilities at Outco
One of the cultivation facilities at Outco

“We are building out a full lab of our own in addition to third party testing to perform internal quality controls,” says Fish. Equipped with their own laboratory instrumentation like HPLC and GC, they hope to establish proper in-house quality controls as well as provide that resource to younger startup companies. As one of the founding partners of Canopy San Diego, an ancillary startup accelerator, Fish sees great potential in working with younger companies to get them off the ground. Fish met Outco’s vice president of extraction, Dr. Markus Roggen, at a Canopy San Diego event. It was there that they had the idea to build a startup accelerator for companies that actually touch the plant- extractors, cultivators and infused-product manufacturers, as opposed to a startup accelerator that would only help ancillary businesses.

Dr. Markus Roggen, vice president of extraction
Dr. Markus Roggen, vice president of extraction

Dr. Roggen, who is an organic chemist by training, heads up Outco’s supercritical CO2 extraction operation. “I came to the ‘art’ of cannabis extraction with an open, yet scientifically focused mind,” says Dr. Roggen. “My approach was to look past the myths and stories about extraction methods and focus on finding data, as there really wasn’t much available. I therefore, from the beginning, started to study the capabilities of our extraction equipment by chemometric methods.” Chemometrics is the science of relating measurements made on a chemical system or process to the state of the system via applications of mathematical methods. “Already the first sets of experiments showed that long-held beliefs in the cannabis community were inaccurate,” says Dr. Roggen. “For example the particle size of extracted material matters. Or that it is possible to preserve and even isolate terpenes by CO2 extraction methods.” With plans to have a full plant and analytical chemistry laboratory on site, they hope to perform more research that focuses on optimizing extraction processes.

Plant irrigation and fertigation procedures are determined via experimentation
Plant irrigation and fertigation procedures are determined via experimentation

Dr. Allison Justice leads their cultivation team with a background in greenhouse management and commercial horticulture. Dr. Justice says plants are grown, starting at a young age (seed or vegetative cutting), with the protection of biological control agents. “Biological control is a management strategy that entails the release of beneficial insects or fungi, such as parasitoids and predators, in order to suppress or regulate insect populations in greenhouses and grow rooms,” says Dr. Justice.

Dr. Allison Justice, vice president of cultivation
Dr. Allison Justice, vice president of cultivation

When implemented properly, this eliminates the need to use synthetic pesticides. “Biological control agents are not put in place to eradicate pest populations yet are applied as preventives to minimize plant damage and maintain their own populations.” They are constantly evaluating light types, spectrum and intensity to determine optimal ranges, according to Dr. Justice. They don’t use any pre-mixed “cannabis” nutrient supplements for their plants, instead they design an experiment to determine the desired levels and ratios of essential plant nutrients. “We have found it crucial to determine what ratios of nutrients the plant actually needs and by knowing this, we know how to manipulate the recipe determined by the plant’s given nutritional symptoms,” says Dr. Justice. Every type of adjustment in cultivation and extraction is based on results from experimentation rooted in legitimate science. Instead of guessing when it might be time to harvest, they use a water activity meter, logging and recording all the data to determine the appropriate time to trim and cure plants. Performing analytical testing at every step is key, says Fish.

Looking toward the recreational market, Fish sees an obvious opportunity to expand their wholesale operations substantially, with several larger new cultivation projects planned. “The key though is to produce flower and concentrate offerings with the same standards we employ for medical cannabis,” says Fish.

From The Lab

QuEChERS 101

By Danielle Mackowsky
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Sample preparation experts and analytical chemists are quick to suggest QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) to cannabis laboratories that are analyzing both flower and edible material for pesticides, mycotoxins and cannabinoid content. Besides having a quirky name, just what makes QuEChERS a good extraction technique for the complicated matrices of cannabis products? By understanding the chemistry behind the extraction and the methodology’s history, cannabis laboratories can better implement the technology and educate their workforce.

QuEChERS salt blends can be packed into mylar pouches for use with any type of centrifuge tubes
QuEChERS salt blends can be packed into mylar pouches for use with any type of centrifuge tubes

In 2003, a time when only eight states had legalized the use of medical cannabis, a group of four researchers published an article in the Journal of AOAC International that made quite the impact in the residue monitoring industry. Titled Fast and Easy Multiresidue Method Employing Acetonitrile Extraction/Partitioning and “Dispersive Solid-Phase Extraction” for the Determination of Pesticide Residues in Produce, Drs. Michael Anastassiades, Steven Lehotay, Darinka Štajnbaher and Frank Schenck demonstrate how hundreds of pesticides could be extracted from a variety of produce samples through the use of two sequential steps: an initial phase partitioning followed by an additional matrix clean up. In the paper’s conclusion, the term QuEChERS was officially coined. In the fourteen years that have followed, this article has been cited over 2800 times. Subsequent research publications have demonstrated its use in matrices beyond food products such as biological fluids, soil and dietary supplements for a plethora of analytes including phthalates, pharmaceutical compounds and most recently cannabis.

QuEChERS salts can come prepacked into centrifuge tubes
QuEChERS salts can come prepacked into centrifuge tubes

The original QuEChERS extraction method utilized a salt blend of 4 g of magnesium sulfate and 1 g of sodium chloride. A starting sample volume of 10 g and 10 mL of acetonitrile (ACN) were combined with the above-mentioned salt blend in a centrifuge tube. The second step, dispersive solid phase extraction (dSPE) cleanup, included 150 mg of magnesium sulfate and 25 mg of primary secondary amine (PSA). Subsequent extraction techniques, now known as AOAC and European QuEChERS, suggested the use of buffered salts in order to protect any base sensitive analytes that may be critical to one’s analysis. Though the pH of the extraction solvent may differ, all three methods agree that ACN should be used as the starting organic phase. ACN is capable of extracting the broadest range of analytes and is compatible with both LC-MS/MS and GC-MS systems. While ethyl acetate has also been suggested as a starting solvent, it is incompatible with LC-MS/MS and extracts a larger amount of undesirable matrix components in the final aliquot.

All laboratories, including cannabis and food safety settings, are constantly looking for ways to decrease their overhead costs, batch out the most samples possible per day, and keep their employees trained and safe. It is not a stretch to say that QuEChERS revolutionized the analytical industry and made the above goals tangible achievements. In the original publication, Anastassiades et al. established that recoveries of over 85% for pesticides residues were possible at a cost as low as $1 per ten grams of sample. Within forty minutes, up to twelve samples were fully extracted and ready to be analyzed by GC-MS, without the purchase of any specialized equipment. Most importantly, no halogenated solvents were necessary, making this an environmentally conscious concept. Due to the nature of the cannabis industry, laboratories in this field are able to decrease overall solvent usage by a greater amount than what was demonstrated in 2003. The recommended starting sample for cannabis laboratories is only one gram of flower, or a tenth of the starting volume that is commonly utilized in the food safety industry. This reduction in sample volume then leads to a reduction in acetonitrile usage and thus QuEChERS is a very green extraction methodology.

The complexity of the cannabis matrix can cause great extraction difficulties if proper techniques are not used
The complexity of the cannabis matrix can cause great extraction difficulties if proper techniques are not used

As with any analytical method, QuEChERS is not perfect or ideal for every laboratory setting. Challenges remain in the cannabis industry where the polarity of individual pesticides monitored in some states precludes them from being amenable to the QuEChERS approach. For cannabis laboratories looking to improve their pesticide recoveries, decrease their solvent usage and not invest their resources into additional bench top equipment, QuEChERS is an excellent technique to adopt. The commercialization of salt blends specific for cannabis flowers and edibles takes the guesswork out of which products to use. The growth of cannabis technical groups within established analytical organizations has allowed for better communication among scientists when it comes to best practices for this complicated matrix. Overall, it is definitely worth implementing the QuEChERS technique in one’s cannabis laboratory in order to streamline productivity without sacrificing your results.