Automatic system for rapid analysis of volatile compounds by purge‐and‐cold‐trapping/capillary gas chromatography

Abstract

Abstract A system for automatic analysis of volatile compounds by purge‐and‐cold‐trapping/capillary gas chromatography is described. It is suitable for analysis of volatile compounds in a wide variety of samples, such as water, food products and environmental samples. Possibilities and limitations of the system are evaluated in relation to several parameters. The efficiency of different types of cryogenic trap (open tubular, coated, packed) is also investigated; it depends on purge‐flow rate, temperature of trapping, and total purge volume. Examples of the analysis of volatile compounds in foods and water are given.