Thiol groups are titrated directly with o-iodosobenzoate reagent at pH 7 employing leuco-2, 6-dichlorophenolindophenol with potassium iodide as indicator. This modification avoids errors that result from side-reactions of iodine, which take place if the excess of iodosobenzoate is made to react with acidified potassium iodide.
K. K. Verma and S. Bose, Analyst, 1975, 100, 366 DOI: 10.1039/AN9750000366
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