Gas chromatography – Mass spectrometry (GC-MS) is a method that combines both the efficiency of gas chromatography and amss spectrometry in order to accurately identify or measure the number of substances. The GC-MS method introduced in the 1950s has developed considerably and is now fully mastered. It is now under computer control and relatively simple to set up, the devices being now autonomous and compact. For quantitative analysis, it is very easy to obtain very precise and exact results thanks to the great dynamic response, the speed of analysis is also very fast.
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