ISO 2993-1974 工业用硫酸铵 游离酸度的测定 滴定法

标准号：ISO 2993-1974
中文标准名称：工业用硫酸铵 游离酸度的测定 滴定法
英文标准名称：Ammonium sulphate for industrial use; Determination of free acidity; Titrimetric method
标准类型：G10
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G10
国际标准分类号：71.060.50
适用范围：Applicable to products having a free acidity, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Dissolution of a test portion in Water and titration with standard volumetric sodium hydroxide solution in the presence of an indicator. The indicator must have a colour change in the pH range between 5.2 and 5.6. Has also been approved by the IUPAC.