Сталь и чугун. Определение содержания азота. Титриметрический метод после перегонки
Название (англ.):
Steel and iron; determination of nitrogen content; titrimetric method after distillation
Описание (англ.):
The principle of the method specified is dissolving a test portion in hydrochloric acid followed by oxidation with hydrogen peroxide, fuming of the acid-insoluble residue in sulfuric acid with potassium sulfate and copper(II) sulfate, distilling the solution made alkaline with sodium hydroxide, collecting ammonia in a receiver containing orthoboric acid solution, titration of the ammonium ion with amidosulfuric acid. Is applicable to nitrogencontents from 0,002 % (m/m) to 0,5 % (m/m); does not apply to samples containing silicon nitride.
Дата регистрации:
01.08.93
Дата введения:
01.07.93
Код ОКС(МКС):
77.080.01
Нормативные ссылки:
NF A06-324(1996/AFNOR), EQV*NF ISO 10702(1996/AFNOR), EQV ISO 377-2-1989*ISO 385-1-1984*ISO 648-1977*ISO 1042-1983*ISO 3696-1987*ISO 5725-1986
Ключевые слова:
CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT DISTILLATION METHODS OF ANALYSIS IRON NITROGEN STEELS TESTING VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN DISTILLATION METHODS