Abstract
Abstract Volatiles occurring in the open atmosphere of forested areas can be determined practically only by employing sample enrichment techniques of gas chromatographic trace analysis. A technique was developed of concentrating trace volatiles from large air samples (5–151) on trapping columns packed with Tenax GC, followed by the thermal desorption and gas chromatographic analysis of the concentrate by using a flame ionization detector. A procedure is shown of calculating the masses of the individual components of the concentrate by virtue of the basic properties of the flame ionization detector as a non-ideal coulometer, which makes it possible to estimate reliably the concentrations of the analytes in the air analysed from the parameters of the chromatogram without direct calibration for the components under determination. At the usual concentrations of the analytes in the forest atmosphere, special measures have to be taken in order to protect the samples entrapped in the Tenax column against contami...
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