Abstract
The glass/Ag0, Ag2S electrode applicable for in situ determination of H2S was tested in solutions of inert electrolytes. No effects on sensitivity, selectivity and slope were found up to an ionic strength of ≈0.7 (artificial seawater). In salty brines such as Dead Sea water or NaClsat. solution a positive potential shift and a slope increase was observed. This corresponds, presumably, to salting-out of the gas. Within the observed precision range of the detection method (+-3%) the electrode allows the measurement of H2Sconcentrations (lower limit of detection: 10−5.5 M Stot). Nevertheless, as a consequence of its half cell combination, the electrode could be a means for the direct detection of the salting coefficient of H2S in hypersaline media (I≫0.1).
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Frevert, T. Determination of hydrogen sulfide in saline solutions. Schweiz. Z. Hydrologie 42, 255–268 (1980). https://doi.org/10.1007/BF02502437
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DOI: https://doi.org/10.1007/BF02502437