ISO 2122-1972 工业用硅酸钠和硅酸钾 沸腾水中难溶物的溶液制备和水不溶物的含量的测定

标准号：ISO 2122-1972
中文标准名称：工业用硅酸钠和硅酸钾 沸腾水中难溶物的溶液制备和水不溶物的含量的测定
英文标准名称：Sodium and potassium silicates for industrial use; Preparation of solution of products not easily soluble in boiling water and determination of matter insoluble in water
标准类型：G10
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G10
国际标准分类号：71.060.50
适用范围：The method is applicable to products corresponding to the general formula M2O . xSiO2, where the values of x lie between 1,5 and 3,5 in the case of sodium silicates and 1,9 and 3,9 in the case of potassium silicates. Because of the difficulty ancountered in dissolving fine particles of these products, the sample is first sieved to remove these fines. The procedure consists in dissolution of the test portion in carbon dioxide-free water, by treatment in an autoclave. Filtration and weighing of the insoluble matter on a tared filter crucible. Dilution of the filtrate to a given volume, from which aliquot samples are taken in order to carry out the different determinations.