Хлорид калия технический. Определение содержания калия. Титриметрический метод с применением тетрафенилбората натрия
Название (англ.):
Potassium chloride for industrial use; Determination of potassium content; Sodium tetraphenylborate titrimetric method
Описание (англ.):
The method is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the previously ground and sifted laboratory sample and elimination of many ammonium ions present. Precipitation of the potassium, in a slightly acid medium, by an excess of an standard volumetric sodiumtetraphenylborate solution. Filtration and back-titration of this excess in the filtrate, with a standard volumetric solution of a quaternary ammonium salt, using bromphenol blue as indicator. Replaces ISO Recommendation R 2052-1971.
Дата введения:
01.02.76
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2109;2147
Код ОКС(МКС):
71.060.50
Код ОКП:
2109;2147
Нормативные ссылки:
NBN T 03-223-1980, EQV*NF T20-359-1978, EQV*NP-1491-1977, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS DETERMINATION OF CONTENT POTASSIUM POTASSIUM CHLORIDE SODIUM TETRAPHENYLBORATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN BORON ORGANIC COMPOUNDS