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Double-Membrane Sampling System in a Mass Spectrometer for the Study of Exhaled Air
A double-membrane sample-introduction system is described that enables mass spectrometric determination of volatile organic compounds in air, while ensuring their detection limits are as low as a few fractions of ppb of sample composition in real time with a response delay from a few seconds to a fe...
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Published in: | Technical physics 2018-10, Vol.63 (10), p.1543-1551 |
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container_title | Technical physics |
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creator | Kogan, V. Antonov, A. S. Chichagov, Yu. V. Victorova-Leclerc, O. S. Victorov, I. V. Kozlenok, A. V. |
description | A double-membrane sample-introduction system is described that enables mass spectrometric determination of volatile organic compounds in air, while ensuring their detection limits are as low as a few fractions of ppb of sample composition in real time with a response delay from a few seconds to a few dozens of seconds. It includes two membrane interfaces separated by a volume, the gas pressure in which is maintained through a channel with an adjustable evacuation cross-section. The results of numerical simulation and experimental testing of the system are provided. A technique for selecting and calculating system parameters is described. The possibility of using this system for diagnosing diseases by trace amounts of biomarkers in exhaled air is discussed. |
doi_str_mv | 10.1134/S1063784218100146 |
format | article |
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subjects | Biomarkers Classical and Continuum Physics Computer simulation Experimental Instruments and Technique Gas pressure Physics Physics and Astronomy Spectrometry VOCs Volatile organic compounds |
title | Double-Membrane Sampling System in a Mass Spectrometer for the Study of Exhaled Air |
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