This International Standard specifies a gasometric method for the determination of carbonates expressed, respectively, as sodium or potassium carbonate, in sodium or potassium silicates for industrial use. Three cases, defined by a preliminary test, are planned: 1.1 Sodium or potassium silicates not containing sulphide or chlorate. 1.2 Sodium or potassium silicates containing sulphides. 1.3 Sodium or potassium silicates containing chlorates.
NBN T 03-236-1980 history
1980NBN T 03-236-1980 Sodium and potassium silicates for industrial use - Determination of carbonates content - Gas-volumetric method