Because of its simplicity, sensitivity, and effectiveness in separating components of mixtures, gas chromatography is one of the most important tools in chemistry. It is widely used for quantitative and qualitative analysis of mixtures, for the purification of compounds, and for the determination of such thermochemical constants as heats of solution and vaporization, vapour pressure, and activity coefficients. ... Gas chromatography is also useful in the analysis of air pollutants, alcohol in blood, essential oils, and food products.
