Abstract
Abstract Sulfide ion was converted to Methylene Blue through the reaction with N,N-dimethyl-p-phenylenediamine in the presence of iron(III) ion. The dye produced was fixed by batch method onto the coagulated mixture of finely divided anion and cation exchange resins. The coagulated material was collected by filtration on a filter paper as a disk of thin layer, which was then soaked in an acetate buffer solution, and subjected to the spectrophotometric analysis. The calibration graph was linear over the range 1.03–10.3 nmol of sulfide. The method was applied to some hot spring waters.
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