Динатрийтетраборат технический. Определение содержания окиси натрия и окиси бора и потерь при сжигании
Название (англ.):
Disodium tetraborates for industrial use; Determination of sodium oxide and boric oxide contents and loss on ignition
Описание (англ.):
The principle of the method consists in determination of the sodium oxide content by addition of an excess of a solution of hydrochloric acid and back titration with a standard volumetric solution of sodium hydroxide in presence of methyl red/bromocresol green as indicator. In the same solution, titration of the boricoxide with standard volumetric solution of sodium hydroxide in the presence of mannitol or sorbitol, using phenolphthalein as indicator. Determination of the loss on ignition by weighing a test portion into a platinum crucible and heating in an electric furnace, maintained at (900 +- 50 )
Заменён стандартами:
Дата введения:
01.05.72
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2123;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2123;2109
Нормативные ссылки:
BS 5688 PART 3-1979, EQV*NBN T 03-343-1981, EQV*NF T20-565-1985, EQV*NP-1398-1976, EQV
Ключевые слова:
ANNEALING LOSSES BORATES BORIC OXIDE CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT SODIUM SODIUM BORATES SODIUM OXIDES TETRABORATES VOLUMETRIC ANALYSIS WATER CHEMICAL ANALYSIS AND TESTIN