ISO 1061-1990 塑料 未增塑的乙酸纤维素 游离酸度的测定

标准号：ISO 1061-1990
中文标准名称：塑料 未增塑的乙酸纤维素 游离酸度的测定
英文标准名称：Plastics; unplasticized cellulose acetate; determination of free acidity
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1990/11/15 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围：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.