Gas chromatography-mass spectrometry (GC-MS) is a powerful analytical technique used in the chemical and pharmaceutical industries for the identification and quantification of chemical compounds. However, there are several synonyms for the term GC-MS, which are often used interchangeably. These include gas-liquid chromatography-mass spectrometry (GLC-MS), gas chromatography-mass spectroscopy, and gas-liquid chromatography-mass spectroscopy. Regardless of the specific term used, the technique involves the separation of a mixture of compounds through a gas chromatography column, followed by their detection and identification through mass spectrometry. GC-MS is widely regarded as a highly sensitive and specific method for the analysis of complex chemical samples, and is routinely used in chemical and food industries, environmental monitoring, and forensic science.