Крахмал и его производные. Определение содержания азота по методу Кьельдаля. Титриметрический метод
Название (англ.):
Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric method
Описание (англ.):
The found value only includes free amino acids, compounds producing amino acids on hydrolysis and ammonium compounds. The principle consists in destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, distillation of the liberated ammonia and collection in a boric acid solution, followed by titration with astandard volumetric sulphuric acid solution. The method applies to contents greater than 0,01 % (m/m). For products with contents less than 0,025 % (m/m), see ISO 5378.
Дата регистрации:
10.08.78
Дата введения:
01.08.78
Код КГС:
Н49
Код ОКСТУ:
9188;9189;9109
Код ОКС(МКС):
67.180.20
Код ОКП:
9188;9189;9109
Нормативные ссылки:
DIN 10303-2-1980, EQV*prEN 23188-1994, EQV*EN ISO 3188-1994, EQV*DIN EN ISO 3188-1994, EQV*BS EN ISO 3188(1994/BSI), EQV*NF V03-607(1994/AFNOR), EQV*NF EN ISO 3188(1994/AFNOR), EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT KJELDAHL METHOD KJELDAHLS METHOD NITROGEN STARCH PRODUCTS STARCHES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN