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Gas Chromatography Mass Spectrometry (GC-MS)
A gas chromatography-mass spectrometer is a mass spectrometer. In gas-solid chromatography, an adsorbent with a large surface area and a certain activity is used as the stationary phase. The basic principle is that each component in the sample is ionized in the ion source to generate positively charged ions with different charge-to-mass ratios, and through the action of an accelerating electric field, an ion beam is formed and enters the mass analyzer. In the mass analyzer, the electric and magnetic fields are used to cause opposite velocity dispersion, and they are respectively focused to obtain a mass spectrum, thereby determining their mass. It has strong separation ability and high sensitivity.
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