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Hydrogen sulphide quantification by SIFT/MS: highlighting the influence of gas moisture

Abstract : The quantification of hydrogen sulphide (H2S) by Selected Ion Flow Tube coupled with Mass Spectrometry (SIFT/MS) was investigated for application in industrial emission context, usually faced with concentrations of water vapour higher than the saturation at room condition. H2S concentrations measured by SIFT/MS (using nitrogen as carrier gas and flow tube temperature at 119°C) were affected by water content, reducing the sensibility for H2S measurements. Accurate concentrations were obtained when the influence of water was considered on SIFT/MS analysis, requiring although the information about water content in the sample. In addition, the association of low concentration of H2S (around 50 ppbv) and high humidity level (4.0 %vol of water) was highlighted as a critical point for measuring H2S by SIFT/MS, due to the sensibility reduction as function of water content and the measurement uncertainty enhancement at low signal intensity.
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Submitted on : Wednesday, September 4, 2019 - 4:13:17 PM
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Leticia Vitola Pasetto, Romain Richard, Jean-Stéphane Pic, Marie-Hélène Manero, Frédéric Violleau, et al.. Hydrogen sulphide quantification by SIFT/MS: highlighting the influence of gas moisture. International Journal of Environmental Analytical Chemistry, Taylor & Francis, 2020, 100 (10), pp.1133-1145. ⟨10.1080/03067319.2019.1650919⟩. ⟨hal-02278814⟩

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