标准摘要
[中文适用范围]： 设想了由初步测试定义的三种情况： 既不含硫化物也不含氯酸盐的硅酸盐；含有硫化物的硅酸盐；含有氯酸盐的硅酸盐。 该方法基于将含有甲基橙和铅纸条的酸化测试部分在蒸气中煮沸。 硫化物的存在会使纸张变黑，氯酸盐的存在会使甲基橙脱色。 体积；测量不含硫化物和氯酸盐的硅酸盐与盐酸溶液反应放出的二氧化碳。 规定了硫化物氧化和氯酸盐还原的原理。 [外文原描述]： Three cases, defined by a preliminary test, are envisaged: silicates containing neither sulphides nor chlorates; silicates containing sulphides; silicates containing chlorates. The method based on boiling of an acidified test portion containing methyl orange and with a lead paper strip in the vapour. The presence of sulphides produces blackening of the paper and the presence of chlorates decolorizes the methyl orange. Volumetric*measurement of carbon dioxide evolved from silicates containing neither sulphides nor chlorates by reaction with a hydrochloric acid solution. The principle for the oxidation of sulphides and the reduction of chlorates are specified.
英文名称Sodium and potassium silicates for industrial use — Determination of carbonates content — Gas-volumetric method