Gas Chromatography-Mass Spectrometry (GCMS)

Gas Chromatography-Mass Spectrometry (GC-MS) is a technique used to analyze the chemical composition of a substance or group of substances in a given sample. Cannabis laboratories use GC-MS machines to identify heavy metals and pesticides in samples. Because GC-MS machines convert samples into a gas via heat, they are not used to identify cannabinoids or terpenes, which decompose rapidly under the heat. Instead, HPLC or standard liquid chromatography machines are used for cannabinoid and terpene content.