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Type: Artigo de periódico
Title: Gas-permeation continuous flow coulometric analysis: Determination of sulphur dioxide
Author: Liu, SJ
Shen, HX
Feng, JX
Tubino, M
Abstract: A gas permeation system using two gaseous streams flowing on both sides of a membrane is developed. This gas permeation device and a coulometric detector are adapted for the continuous measurement of relatively high concentrations of sulphur dioxide. The interferences of other gases (NO2, NO and CO2) can be eliminated by using a scrubber behind the gas permeation device in the acceptor stream. The effects of the donor flow rates and gas pressure as well as the membrane thickness on the signal are discussed. The relative standard deviation is 1.3% (n = 7) for 2.002 x 10(-3) mol/mol certified sulphur dioxide.
Editor: Springer Verlag
Citation: Fresenius Journal Of Analytical Chemistry. Springer Verlag, v. 357, n. 8, n. 1045, n. 1049, 1997.
Rights: fechado
Identifier DOI: 10.1007/s002160050302
Date Issue: 1997
Appears in Collections:Unicamp - Artigos e Outros Documentos

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