The Highs and Lows of GC-MS in Essential Oil Analysis

by Alex St-Gelais Anyone seeking information about essential oil quality soon learns about the existence of gas chromatography (GC) testing. Quite often GC and GC-MS (gas chromatography / mass spectrometry), are discussed as if they were synonymous. This is not the case, as GC and MS are two separate pieces of equipment, each with its