ISO 1693-1976 标准详情
- 标准号:ISO 1693-1976
- 中文标题:天然和人造冰晶石 氟含量的测定 威拉德-温特尔的改进法
- 英文标题:Cryolite, natural and artificial; 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:1976-09
Specifies the determination for natural and synthetic materials having a molar ratio sodium fluoride/aluminium trifluoride between 3 and 1,7 approximately. The principle consists in fusion of a test portion with sodium carbonate, separation of fluori
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