POP and PAH in Bizerte Lagoon, Tunisia

Gas chromatography is the most recent branch of chromatography and includes all the chromatography processes in which the substance to be analyzed occurs in the gaseous or vapor state or can be converted into such a state. Although the first records of gas chromatography go back hundreds of years (Bayer, 1959), its true history began during World War II when a large industrial chemical company instituted a crash its development (Tietz, 1970). The first published work appeared in the early 1950 ́s based on the successful experiments by James and Martin (1952). In the years between 1952 and 1956 the early apparatus came into sight. The success of gas chromatography is due to its simplicity of operation, high separation power and speed. Its use involves versatile applications not only to the field of chemistry but also biology, medicine, industrial research and control, environmental health and scientific studies.