ISO 5520:1981 水果、蔬菜及其制品.总灰分碱度和水溶性灰分的测定

标准编号：ISO 5520:1981

中文名称：水果、蔬菜及其制品.总灰分碱度和水溶性灰分的测定

英文名称：Fruits, vegetables and derived products — Determination of alkalinity of total ash and of water-soluble ash

发布日期：1981-08

标准范围

在525+/-25摄氏度下焚烧产品后，该方法包括a）在总灰分的情况下:添加过量的标准体积硫酸溶液，并用标准体积氢氧化钠溶液反滴定，b）对于水溶性灰分:用热水提取灰分，并用标准体积硫酸溶液中和水提取物。

After incineration of the product at 525 +/- 25 degrees centigrade the method consists in a) in the case of total ash: addition of an excess of standard volumetric sulphuric acid solution and back titration with standard volumetric sodium hydroxide solution, b) in the case of water-soluble ash: extraction of the ash with hot water and neutralization of the aqueous extract with standard volumetric sulphuric acid solution.

标准预览图