ISO 6228:1980 工业用化学制品.通过还原和滴定分析法测定微量硫化合物(如硫酸盐)的一般方法

标准编号:ISO 6228:1980

中文名称:工业用化学制品.通过还原和滴定分析法测定微量硫化合物(如硫酸盐)的一般方法

英文名称:Chemical products for industrial use — General method for determination of traces of sulphur compounds, as sulphate, by reduction and titrimetry

发布日期:1980-11

标准范围

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.

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