Пластмассы. Непластифицированная ацетилцеллюлоза. Определение содержания свободной кислоты
Название (англ.):
Plastics; unplasticized cellulose acetate; determination of free acidity
Описание (англ.):
The free acidity determined by this method includes acidity extractable by water and acidity due to acidic groups directly attached to the cellulose acetate, e.g. carboxyl groups. This method is not suitable for cellulose acetate containing any additives which may affect thetest. The principle consists in treating a test portion of cellulose acetate with water and titrating the resultant solution with sodium hydroxide solution. The free acidity is calculated as the percentage, by mass, of free acetic acid in the cellulose acetate. This second edition cancels and replaces the first edition ISO 1061:1975, of which it constitutes a minor technical revision.
Заменяет стандарты:
ISO 1061(1975.06)
Дата регистрации:
15.03.91
Дата введения:
15.11.90
Код КГС:
Л29
Код ОКСТУ:
2231
Код ОКС(МКС):
83.080.20
Код ОКП:
2231
Нормативные ссылки:
DIN 53729-1968, EQV*BS 2880(1991/BSI), NEQ*BS 2782 PART 4 METHOD 459A(1991/BSI), EQV*prEN ISO 1061-1998, EQV ISO 565-1990*ISO 585-1990
Ключевые слова:
ACIDIMETRY ACIDITY CELLULOSE ACETATE CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT PLASTICS CHEMICAL ANALYSIS AND TESTIN