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Title: Spot Sampling Techniques
Author: Gary Hollars
Source: 1997 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1997
Abstract: Why take a spot gas sample? The answer is apparent. In todays unregulated and competitive natural gas industry, accurate measurement is more important every day. Since the composition of natural gas directly affects volumes, reliable sample results are a necessity to ensure accurate volume calculations. Spot samples are exactly that, a cylinder filled with natural gas and representative of only the gas flowing at the time the sample is taken. A spot sample for lab analysis is usually taken on lower volume stations as opposed to larger volume stations that use a proportional to flow contmuous sampler or an on line gas chromatograph. This paper will deal only with spot samples and techniques. Another type of spot samplmg that has became widely used m the natural gas industry is the glass tube - suction pump method. This procedure is used to obtain quick readings on natural gas to see if it contains high dew points, carbon dioxide, hydrogen sulfide, etc. This presentation will touch briefly on techniques for using this method.

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