NEN 6441:1979被替代
Water - Determination Of Total Hardness And Calcium And Magnesium Content
出版：Nederlands Normalisatie Instituut
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基本信息
標準編號： NEN 6441:1979
發布時間：1979/5/1 0:00:00
標準類別：Standard
出版單位：Nederlands Normalisatie Instituut
標準頁數：6
標準簡介
Explains a titrimetric method to determine the total hardness and the content of calcium and magnesium ions in water. Applies to any kind of water with a total hardness of at least 5 micro mol/l (0,01 mg/l), a calcium content of at least 1 mg/l and a magnesium content of at least 1 mg/l. However this method is not suitable for waste water.
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