BS EN ISO 7327-1996 塑料.环氧树脂用固化剂和促进剂.酸酐中游离酸测定

标准号：BS EN ISO 7327-1996
中文标准名称：塑料.环氧树脂用固化剂和促进剂.酸酐中游离酸测定
英文标准名称：Plastics - Hardeners and accelerators for epoxide resins - Determination of free acid in acid anhydride
标准类型：G31
发布日期：1996/1/15 12:00:00
实施日期：1996/1/15 12:00:00
中国标准分类号：G31
国际标准分类号：83.040.30;83.080.10
适用范围：The principle of the method specified is reacting a small amount of free acid present in a test portion of acid anhydride hardener or accelerator with rhodamine 6G to colour the test solution pink, measuring the absorbance of the coloured solution at a wavelength of about 510 nm using a spectrometer, determining the free-acid content from a calibration curve. The method is suitable for most anhydrides except for polyester and oligomeric anhydrides which may give too wide a scatter of results.