Measurement of absorption coefficients in vapour-phase infrared spectra by means of gas chromatographic-infrared systems

In addition to stopped-flow gas chromatographic-infrared (GC-IR) systems and static vapour cells, GC-IR systems without a stopped-flow facility can also be used to measure vapour-phase IR spectra of appropriate quality. An expression was derived for the determination of concentrations in this type of measurement, which can be used to determine integrated absorption coefficients of practical and theoretical importance.