Accurate Detection of Residual Solvents in Cannabis Concentrates

Author: Chris English

Restek Corporation

Published By: Cannabis Industry Journal

Year of Publication: 2017

Link: https://www.cannabisindustryjournal.com/category/the-practical-chemist/

Abstract:

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. 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.