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Title: Gas Analysis - A Tool For Quality Control And Problem Solving
Author: Fred Gollob
Source: 1976 Appalachian Gas Measurement Short Course
Year Published: 1976
Abstract: There are many different analytical procedures that are used in the gas industry and I want to briefly mention some of the more common methods that are used and what their major applications are. Then, I shall concentrate on the two most versatile, Gas Chromatography and Mass Spectrometry. Density, or specific gravity, is characteristic of the average composition of a gas. It is merely the weighted sum of the densities of the individual components and tells us nothing about the individual components. Thus, a mixture of carbon dioxide and hydrogen can have the same density as methane. Density is useful, however, once you know the approximate composition that you are dealing with. Then, with natural gas, for example, the density is a measure of the amount of minor constituents that are present in the methane. Density is measured continuously by in-line instruments, or can be calculated once the composition of a gas mixture is known.

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