ISO 3197-1975 标准详情
- 标准号:ISO 3197-1975
- 中文标题:工业用氢氧化钠;氯化物含量测定;光度测定法
- 英文标题:sodium hydroxide for industrial use; determination of chlorides content; photometric method
- 标准类别:国际标准化组织标准ISO
- 发布日期:1975-03-01
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50 mg/kg the method specified in ISO 981 shall be used. The principle consists in the quantitative displacement of the thiocyanate ion
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