標準號：ISO 2122-1972
中文標準名稱：工業用硅酸鈉和硅酸鉀 沸騰水中難溶物的溶液制備和水不溶物的含量的測定
英文標準名稱：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
標準類型：G10
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G10
國際標準分類號：71.060.50
適用范圍：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.