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9
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vol 63 / September, 2020
Article

DOI 10.17586/0021-3454-2020-63-8-763-768

UDC 616-71

MEASURING DEVICE FOR DETERMINING THE CONCENTRATION OF SULFUR-CONTAINING SUBSTANCES IN EXHALED GAS

N. I. Ivanova
Tver State Technical University; Department of Biotechnology, Chemistry and Standardization;


C. V. Sidorov
Tver State Technical University; Ph.D.


Abstract. A device for measuring micro-concentrations of sulfur-containing substances in gaseous media is developed. The detector is a photoionization generator with a thermo-isolated cylinder. The detector de-sign and principle of operation are described, the possibility of its application in a measuring system in-tended to determine micro-concentrations of sulfur-containing substances in exhaled gas is considered. The measuring system schematic is given, its elements and practical operation are described. The sys-tem efficiency in determining sulfur-containing substances concentrations in the range of 0—20 ppb is confirmed experimentally.
Keywords: photoionization, ultra-violet lamp, sulfur-containing substances, respiratory diagnostics, potential difference

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