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Title: FUNDAMENTALS OF GAS CHROMATOGRAPHY
Author: Duane Smith
Source: 2022 Appalachian Gas Measurement Short Course
Year Published: 2022
Abstract: Gas chromatography is one of the most widely used tech- niques for analyzing hydrocarbon mixtures. Some of the advantages of chromatography are the range of measure- ment (from ppm levels up to 100%), the detection of a wide range of components, and the repeatability of the measurements. Chromatography is used in the labora- tory, in permanently installed online systems, and in the field with portable systems. No matter the location, style or brand, all gas chromatographs are composed of the same functional components that are the sample handling sys- tem, the chromatograph oven, and the controller electron- ics (refer Figure 1). This paper will cover the principles or sample handling, how chromatograph columns separate the components, why and how multi-port analysis valves are used, the common detector type used in the hydro- carbon applications, and the analysis processing that pro- vides the component concentrations and the other calcu- lated values (such as heating value and specific gravity) through physical reports or interfaces to other devices.

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