Potentiometric Determination of Copper with 2,5-Dimercapto-1,3,4-thiadiazole

[摘要] A potentiometric titration method has been developed for the titration of copper with 2,5-dimercapo-1,3,4-thiadizole in aqueous solution using a silver electrode as an indicator electrode vs. the standard calomel electrode as a reference electrode. The 2,5-dimercapto-1,3,4-thiadiazole is very sensitive reagent for copper, which has been found to be highly selective for potentiometric determination of copper. Direct titration of trace amount of copper (0.02¡­0.1 mg) is possible in the presence of a number of foreign ions in aqueous solution containing potassium hydrogen phthalate and sodium fluoride as masking agent under atmosphere.

[学科分类] 化学（综合）