Gas Chromatography Gc

Gas chromatography (GC) is an analytical chemistry technique used to separate and identify volatile compounds in cannabis plant material, particularly terpenes and cannabinoids. In cannabis genetics work, GC—often paired with mass spectrometry (GC-MS)—provides quantitative terpene profiles by vaporizing samples and measuring individual compound retention times. This method has become standard in breeding programs and seed banks for documenting chemotype consistency across generations. GC data helps breeders track terpene expression patterns and verify genetic stability, though results can vary based on sample preparation, plant tissue type, and timing of analysis.

Breeders use GC profiling to fingerprint strain lineages, confirm genetic purity in seed production, and select parent plants with consistent aromatic chemistry. Standardized GC reports allow seed companies to document terpene profiles across seed batches, supporting reproducibility claims in breeding records.