ISO 2993:1974 工业用硫酸铵.游离酸度的测定.滴定法

标准编号：ISO 2993:1974

中文名称：工业用硫酸铵.游离酸度的测定.滴定法

英文名称：Ammonium sulphate for industrial use — Determination of free acidity — Titrimetric method

发布日期：1974-04

标准范围

适用于游离酸度（以H2 SO4表示）等于或大于0.01%（m/m）的产品。将试样溶解在水中，并在指示剂存在下用标准体积氢氧化钠溶液滴定。指示剂的pH值必须在5.2至5.6之间变化。也得到了IUPAC的批准。

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.

标准预览图