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Title: Btu Analysis Using A Gas Chromatograph
Author: Steven G. Lakey
Source: 2004 International School of Hydrocarbon Measurement
Year Published: 2004
Abstract: For custody transfer of natural gas, not only does one need to know the quantity of gas being sold, but also the quality. A small error in gas quality will translate into many dollars when multiplied over large volumes of natural gas. Currently, gas chromatography is the preferred method for determining the quality or heating value of natural gas. The analysis also provides critical data such as specific gravity and compressibility. This paper will cover the basic hardware in a gas chromatograph. The basic theory of chromatography will be discussed, as well as how the heating value is calculated from the analytical results.

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