Abstract

The thermometric titration of sulfide with permanganate in alkaline solution has been investigated as a potential analytical method for the determination of sulfide in natural waters. The molar enthalpy of the corresponding complex calorimetric reaction has been determined as 1010 ±36 kJ mol − and the interference effect of a variety of anionic and heavy metal cationic species has been investigated. The analytical potential of the proposed thermoanalytical method has been further tested by application to sulfide determination in a sewage sample and comparison made with sulfide assay of the same sample by differential pulse polarography.

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