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Title: Application Of Gas Chromatograph For On-Line Analysis Op Natural Gas
Author: Lelghton Fields
Source: 1984 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1984
Abstract: Gas chromatography is a method by which gas or vaporizable liquid mixtures are physically separated into their individual components and quantified. There are four major elements in any gas chromatograph: (l) carrier gas for transporting the sample along the column, (2) means of introducing the sample, (3) separating column, and (H) detector. The carrier gas is regulated for a constant flow through the column and detector. The sample is introduced at the head of the column and the progress of the individual component through the column is governed by its vapor pressure and its interaction with the stationary phase. The individual components will sequentially exit the column into the detector which produces a signal proportional to its concentration. Figure 1 shows a basic on-line chromatograph which has the additional elements required to bring the sample to the chromatograph and record the data.

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