1. History of the GC/MS
Mass spectrometry has been described as the smallest scale in the world, not because of its size but because of the size of the things it weighs. Mass spectrometry, also called mass spectroscopy, is an instrumental approach that allows for the mass measurement of molecules. The five basic parts of any mass spectrometer are a vacuum system, a sample introduction device, an ionization source, a mass analyzer and an ion detector. Combining these parts, a mass spectrometer determines the molecular weight of chemical compounds by ionizing, separating, and measuring molecular ions according to their...
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