Chapter 23 Nonhydrocarbon gases

Publisher Summary Modern gas analysis has developed from the classical to instrumental methods, characterized by measuring physical values, and from macro- to microtechniques, characterized by improved apparatus for measurement. Although this development can be traced from the beginning of this century, the greatest advances in chromatographic principles and instrumentation are accepted as a new basis of gas analysis. This is characterized by a shift from the separation of simple to complex mixtures and to trace analysis. Interest in analyzing permanent and hydrocarbon gases by separation methods is, of course, supported by practical industrial needs. Gas–solid chromatography (GSC) in the elution mode is the most convenient method for this purpose, but frontal and sometimes displacement techniques and gas–liquid chromatography (GLC) have found applications in the solution of some problems (e.g., enrichment procedures, determination of the composition of gases containing higher-boiling vapors or vice versa).