ISO 2174-1990 标准详情
- 标准号:ISO 2174-1990
- 中文标题:表面活性剂 已知钙硬度水的制备
- 英文标题:Surface active agents; preparation of water with known calcium hardness
- 标准类别:国际标准化组织标准ISO
- 发布日期:1990-04
A stock solution is prepared by dissolving an appropriate quantity of calcium chloride in water. The calcium content of this stock solution is determined by complexometric titration with the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA)
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