Abstract
This article describes a method involving the subtraction of the unsaturated compounds using concentrated sulfuric acid and silver and mercury salts, with which unsaturated hydrocarbons form nonvolatile compounds. The studies were carried out in an LKhM-8MD chromatograph with a flame ionization detector (FID). The subtraction reagents were prepared by impregnating refractory brick with solutions of the salt. The subtraction effect was tested on artificial mixtures of air containing added C/sub 2/-C/sub 5/ paraffinic, olefinic, dienic, and acetylenic hydrocarbons in concentrations from 10 to 100 ppm by volume. An analysis of air samples shows that oxygen affects the response of the FID. Aluminium oxide modified with 15% by weight of white mineral oil was used as the sorbent for the analysis of the air samples. The absolute calibration method on one hydrocarbon (butane) is used for the quantitative evaluation of the results of the analysis.
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