ISO 685:1975 肥皂分析.碱总含量和脂肪质总含量的测定

标准编号：ISO 685:1975

中文名称：肥皂分析.碱总含量和脂肪质总含量的测定

英文名称：Analysis of soaps — Determination of total alkali content and total fatty matter content

发布日期：1975-10

标准范围

该方法包括用已知体积的标准体积矿物酸溶液分解肥皂，用轻质石油萃取和分离游离的脂肪物质，并通过用标准体积氢氧化钠溶液滴定水相中所含过量酸来测定总碱含量。从提取物中蒸发轻质石油后，将残渣溶解在乙醇中，并用标准体积氢氧化钾溶液中和脂肪酸。蒸发乙醇并称重形成的肥皂，以确定总脂肪含量。

The method consists in decomposition of the soap by a known volume of standard volumetric mineral acid solution, extraction and separation of the liberated fatty matter with light petroleum and determination of a total alkali content by titration of the excess of acid contained in the aqueous phase with a standard volumetric sodium hydroxide solution. After evaporation of the light petroleum from the extract, dissolution of the residue in ethanol and neutralization of the fatty acids with a standard volumetric potassium hydroxide solution. Evaporation of the ethanol and weighing of the soap formed to determine the total fatty matter content.

标准预览图