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摘要

A method and a device, a gas chromatograph, for continuous, automatic air analysis. The gas chromatograph is provided with a pre-concentrating step (1) which, besides the function of concentrating those substances that are to be analyzed in an air sample, is also functioning as a purification step. Because of this, the air present in the sample can be utilized as carrier gas through column (2) and detector (4). A separate carrier gas source or a complicated purification system is thus not required for using the atmospheric or ambient air as carrier gas.