Emerald 2019

Emerald Conference 2019

Restek at Emerald 2019
Restek at Emerald 2019


A Simple Approach to Analyzing Residual Solvents in Cannabis Concentrates via HS-GC
Colton Myers (presenter)
Restek Corporation
For more information, email Colton Myers.
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With more states legalizing medical and recreational use of cannabis, there is a need for analytical methodologies to ensure consumers receive safe products. Currently, there is a growing trend in cannabis concentrate products. These concentrates are created by extracting the chemical compounds, such as delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD), from cannabis flower. Manufacturers use a variety of extraction solvents in their processes. This study focused on analyzing residual solvents in cannabis concentrates with a like-USP <467> sample preparation technique. Subsequently, residual solvents were extracted with the more “classical” approach of HS-syringe and then compared to extractions with a large-volume HS-SPME approach (i.e., SPME Arrow). Comparison results and a simple solution for analyzing these complex matrices will be presented.

The LC-UV Analysis of 16 Cannabinoids of Interest in Cannabis and Cannabis Products
Nathaly Reyes-Garcés (presenter)
Restek Corporation
For more information, email Nathaly Reyes-Garcés.
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While methods have been published that show the separation of major cannabinoids, many do not take into account the possibility of interference from minor cannabinoids. This is most problematic in concentrates where minor cannabinoids can be enriched to detectable levels. Additionally, some terpenes have been shown to absorb UV light at the same wavelength as cannabinoids, which can result in an additional source of interference. In this study, the LC-UV separation of 16 cannabinoids of interest was performed while monitoring for the potential impact from minor cannabinoids and terpenes on reported potency values. The method is applied to commercially available cannabis, cannabis concentrates, cannabis-infused edibles, and CBD oils.

The Analysis of Mycotoxins in CBD Oils by LC-MS/MS
Justin Steimling (presenter)
Restek Corporation
For more information, email Justin Steimling.
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Mycotoxins, secondary metabolites produced by fungi, are among the most toxic contaminants in cannabis and other agricultural products that can cause disease and death in humans and other animals. In the analysis of mycotoxins, using immunoaffinity columns (IACs) to reduce matrix effects and eliminate potential sources of interference for LC-MS/MS analysis is common. When not used, significant matrix interferences have been shown to elute near target mycotoxins resulting in an adverse effect on measured ion ratios. Herein, alternative approaches to IACs including dilute-and-shoot, dispersive solid phase extraction (dSPE), and pass-through SPE are evaluated and applied to the analysis of aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, and ochratoxin A in commercially available CBD oils by LC-MS/MS.

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