Силикаты натрия и калия технические. Определение содержания карбонатов. Газоволюметрический метод
Название (англ.):
Sodium and potassium silicates for industrial use; Determination of carbonates content; Gas-volumetric method
Описание (англ.):
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.
Дата введения:
01.07.76
Код КГС:
Л19
Код ОКСТУ:
2145;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2145;2109
Нормативные ссылки:
BS 6092 PART 4-1981, EQV*NBN T 03-236-1980, EQV*NF T20-524-1973, EQV
Ключевые слова:
CARBON DIOXIDE CARBONATES CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT GAS-VOLUMETRIC ANALYSIS GASOMETRIC ANALYSIS POTASSIUM POTASSIUM SILICATES SODIUM SODIUM SILICATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN