GC-AAS is a hyphenated technique that combines gas chromatography and atomic absorption spectroscopy. It allows for the separation of components using GC and then determines the elemental composition of each peak by introducing the GC effluent directly into the AAS. Some key applications include analysis of leaded gasoline, quality control of drugs and metabolites in body fluids, food analysis, and environmental monitoring of pollutants. GC-AAS provides sensitive and selective detection of volatile metal compounds and is used in areas like sports anti-doping and forensic toxicology.