Gaseous phase chromatography

This technique, which was invented in 1952, enables the different molecules in a mixture (which is gaseous or which can be vaporised) to be separated. The substance to be analysed is vaporised in a column containing an active product, called the stationary phase. The different molecules of the mixture exit the column after a certain time depending on the affinity which they have with the stationary phase. A detection system is placed after the column to collect and identify the signals transmitted by each type of molecule.