描述了一种方法，该方法基于将试验部分中的硫化物事先转化为硫酸盐（如果需要），以及在盐酸存在的情况下，通过氢碘酸和膦酸的混合物还原硫酸盐离子ti硫化氢。将硫化氢吸入氮气流中，并在丙酮水溶液中的氢氧化钠溶液中吸收，然后在1,5-二苯基-3-硫脲（二硫代臭氧）作为指示剂的情况下，用标准体积的醋酸汞（II）或硝酸盐溶液滴定硫化物离子。

Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by titration of the sulphide ions with standard volumetric mercury(II) acetate or nitrate solution in the presence of 1,5-diphenyl-3-thiocarbazone (dithiozone) as indicator.