A fully extended description is given of an automated setup to monltor H,S continuously in a sensltlve, qualitative, and quantltatlve way. H,S Is led by a stream of N, Into an alkallne solution and is contlnuousty determlned as S2-by a potentiometric detectlon system. The H,S detection system has been applied to the temperature-programmed reduction (TPR) of fossil fuel samples. The TPR procedure conslsts of the nonIsothermal heating of a sample in a reducing atmosphere, In order to liberate the different sulfur functional groups as H,S at dlscrete temperature ranges.

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