Објављен
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 the test. 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.
ПОВУЧЕН
ISO 1061:1975
ОБЈАВЉЕН
ISO 1061:1990
90.20
Почетак поступка преиспитивања стандарда
15. 4. 2025.
Plastične mase- Neplastifikovani acetat celuloze- Određivanje slobodne kiselosti
60.60 Стандард објављен
Да бисте видели цео садржај, морате се регистровати или пријавити помоћу корисничког имена које већ имате.