标准摘要
[中文适用范围]： 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：添加过量的标准容量硫酸溶液并用标准容量氢氧化钠溶液反滴定，b) 在水溶性灰分的情况：用热水提取灰分，并用标准容量硫酸溶液中和水提取物。 [外文原描述]： 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.
英文名称Fruits, vegetables and derived products — Determination of alkalinity of total ash and of water-soluble ash