Кислота муравьиная техническая. Методы испытаний. Часть 7. Определение малого содержания других летучих кислот. Титриметрический метод после перегонки
Название (англ.):
Formic acid for industrial use; methods of test; Part VII : Determination of low contents of other volatile acids; Titrimetric method after distillation
Описание (англ.):
The principle consists in a decomposition of most of the formic acid in a test portion by sulphuric acid an of the remainder by chromic acid. Steam distillation of acetic acid and/or other volatile acids and titration of the distillate with standard volumetric sodium hydroxide solution in the presence of phenolphthalein asindicator. The method is applicable to products containing less than 0,5 % (m/m) of other volatile acids, expressed as acetic acid. The ISO Recommendation R 1913-1971 was review and has been changed to ISO 731/7. ISO 731/7 replaces ISO/R 1913-1971, to which it is technically identical.
Заменяет стандарты:
ISO/R 1913:1971
Дата введения:
01.02.77
Дата отмены:
30.05.02
Код КГС:
Л29
Код ОКСТУ:
2431;2409
Код ОКС(МКС):
71.080.40
Код ОКП:
2431;2409
Нормативные ссылки:
NBN T 04-007-1983, EQV
Ключевые слова:
ACIDITY CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHLORIDES DETERMINATION OF CONTENT FORMIC ACID SULPHATES TESTING TESTS CHEMICAL ANALYSIS AND TESTIN