ISO 2833-1973 标准详情
- 标准号:ISO 2833-1973
- 中文标题:工业用氟化钠;氟含量测定;改进WILLARD-WINTER法
- 英文标题:sodium fluoride for industrial use; determination of fluorine content; modified willard-winter method
- 标准类别:国际标准化组织标准ISO
- 发布日期:1973-12-15
The principle consists in separation of the fluorine from a test portion by distillation with sulphuric acid or perchloric acid. Titration with thorium nitrate solution using sodium alizarinsuphonate and methylene blue as indicators. Alternatively th
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