Мочевина техническая. Определение содержания биурета. Фотометрический метод
Название (англ.):
Urea for industrial use; Determination of biuret content; Photometric method
Описание (англ.):
Applicable to the determination in the presence of ammoniacal salts less than 15 mg in the aliquot amount taken for the determination. In the presence of quantities exceeding 15 mg the ammoniacal nitrogen shall be removed by a cation exchange resin because these salts interfere with the determination. The principle of the reaction consists in formation of aviolet-red complex between allophanic acid amide (H2 N.CO.NH.CO.NH2 ) and copper sulphate in the presence of an alkaline solution of potassium sodium tartrate. Photometric measurement at a wavelength of about 550 nm. Has also been approved by the IUPAC.
Дата регистрации:
01.12.73
Дата введения:
01.12.73
Дата отмены:
30.05.02
Код КГС:
Л29
Код ОКСТУ:
2181;2109
Код ОКС(МКС):
71.080.30
Код ОКП:
2181;2109
Нормативные ссылки:
BS 4279-1968, NEQ*NBN T 04-310-1983, EQV*NP-1628-1979, EQV
Ключевые слова:
BIURET DETERMINATION OF CONTENT PHOTOMETRY PHOTOMETRY (CHEMICAL ANALYSIS) UREA UREAS SPECTROCHEMICAL ANA