Gas chromatography (GC) is a flexible technique that allows separation and quantification of chemical substances found within a complex mixture. For example it can be used for quantification of bioethanol produced during fermentation of biomass or determination of the fatty acid profile in oilseeds.
Specifically, gas-liquid chromatography (GLC) – involves a sample, containing the chemical(s) of interest, being vaporised and injected onto a chromatographic column. The sample is transported through the column by the flow of inert, gaseous mobile phase. The column itself contains a liquid stationary phase which coats the walls of the chromatography column. The chemicals being analysed interact with stationary phase, with each chemical travelling through the column in a different times – this is known as the retention time. The analytical value of GC is based on the comparison of retention times.
To learn more about how our gas chromatograph can be put to use speak to our analytical specialist Raymond.