ISO 2272-1989 表面活性剂 肥皂 用分子吸收光谱法测定低含量游离甘油

标准号：ISO 2272-1989
中文标准名称：表面活性剂 肥皂 用分子吸收光谱法测定低含量游离甘油
英文标准名称：Surface active agents; soaps; determination of low contents of free glycerol by molecular absorption spectrometry
标准类型：Y40;Y43
发布日期：1999/12/31 12:00:00
实施日期：1989/7/15 12:00:00
中国标准分类号：Y40;Y43
国际标准分类号：71.100.40
适用范围：The determination is carried out in the following way: Decomposition of the soap by sulfuric acid and extraction of the fatty acida with light petroleum. Oxidation of the free glycerol remaining in the aqueous phase by periodic acid to formic acid and formaldehyde. On reaction with chromotropic acid, the aldehyde formed gives an absorbing compound whose absorbance is propotional to the free glycerol content. Spectrometric measurement of the absorbance at a wavelength about 571 mm.