Борат натрия неочищенный технический. Определение содержания общего и щелочерастворимого кальция и магния. Титриметрический метод
Название (англ.):
Crude sodium borates for industrial use; Determination of total and alkali-soluble calcium and magnesium contents; Titrimetric method
Описание (англ.):
The calcium content is determined by titration of an aliquot portion of the test solution with ethyleneglycol-bis-(2-aminoethyl)-N,N,N',N'-tetra acetic acid, disodium salt (EGTA) solution using 2-carboxy-2'-carboxy-2'-hydroxy-5'-sulphoformazylbenzene (Zincon) as indicator. The combinedmagnesium and calcium contents are determined by titration of a further aliquot portion of the test solution with ethylenediaminetetra-acetic acid, disodium salt (EDTA) solution, using Mordant black 11/potassium chloride as indicator, after addition of triethanolamine solution and buffer solution. The magnesium content is calculated by difference.
Дата регистрации:
01.01.85
Дата введения:
01.11.84
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2146;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2146;2109
Нормативные ссылки:
BS 5688 PART 29-1986, EQV*NF T20-564-1985, EQV*NBN T 03-369(1988/IBN), EQV
Ключевые слова:
BORATES CALCIUM CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT INDUSTRIAL PRODUCTS MAGNESIUM SODIUM SODIUM BORATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN