Introduction of Gas-Chromatographic Samples to a Mass Spectrometer

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Abstract
Of the various physical and chemical methods commonly used for qualitative analysis of gas-chromatographic fractions, only mass spectrometry can be routinely used with samples as small as 10−8 to 10−10 g. However, full utilization of this sensitivity is possible only by proper selection of the method of introducing the samples, and the methods generally employed vary in their minimal identification requirement from 10−4 to 10−10 g. Each sampling technique has different merits. The advantages of the various collection methods are compared with the various direct-coupling methods. Examples are presented to illustrate the types of sample advantageously analyzed with each system.