Gas Chromatography Testing

Gas chromatography (GC) is an analytical chemistry technique used to separate and identify volatile compounds in cannabis plant material and extracts. In cannabis testing, GC instruments heat samples to vaporize cannabinoids, terpenes, and other volatile molecules, then pass them through a column where compounds separate by boiling point and chemical properties before detection. GC data is commonly used to profile terpene content, detect residual solvents, and measure cannabinoid ratios in breeding programs and quality control. Unlike liquid chromatography methods, GC requires volatile compounds and is particularly valuable for terpene profiling because it can resolve individual terpene molecules with high precision. Breeders and testing labs frequently employ GC as a standard tool for documenting chemotype consistency across generations.

Breeders use GC testing to objectively document terpene profiles and cannabinoid ratios in parent plants and offspring, enabling informed selection for desired aromatic and chemical traits. Consistent GC data across multiple plants helps establish stable chemotypes within a line.