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Title: The Impact Of Sample Conditioning On Gas Chromatographs
Author: Shane Hale
Source: 2008 Natural Gas Sampling Technology Conference
Year Published: 2008
Abstract: Gas Chromatography is the industry accepted method of analyzing Natural Gas to determine the gas quality and physical properties used in the fiscal transfer. The values obtained from the Gas Chromatograph (GC) are used to calculate the corrected volumetric flow, and the total energy of the Natural Gas passing through the custody transfer station. Inaccuracies in the analysis of the gas directly impacts the users financially to a much larger degree than the cost to minimize these inaccuracies. One of the most common cause of inaccurate analysis is the improper sample handling practices which result in the composition of the gas changing between the sample point and the GC sample injection. Much has been written regarding the recommended practices for sample handling for gas chromatographs. This paper will present two real world examples of the impact of incorrect sample handling on the analysis, and thus the financial performance of the custody metering station.

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