標準號：DIN 38406-3-2002
中文標準名稱：德國對水、廢水和淤泥的標準檢驗方法.陽離子(E組).第3部分:配位滴定法測定鈣和鎂(E3)
英文標準名稱：German standard methods for the examination of water, waste water and sludge - Cations (group E) - Part 3: Determination of calcium and magnesium, complexometric method (E 3)
標準類型：Z23
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：Z23
國際標準分類號：13.060.50
適用范圍：The document specifies two chemical methods. The first method is applicable to the determination of the mass concentration of calcium in ground water, surface water and drinking water in mass range from 2 mg/l to 100 mg/l (accordingly 0,05 mmol/l to 2,5 mmol/l). A higher calcium range the sample shall be diluted accordingly. The method is applicable to waste water, too, if there are no interfering concentrations of heavy metals. The second method is applicable to the determination of the sum of the concentration of calcium and magnesium in ground water, surface water and drinking water with concentrations of calcium and magnesium higher than 0,05 mmol/l. Sea water and water with comparable high salt contents as well as waste water shall not be examined with this method. In this case DIN EN ISO 7980 (atomic absorption spectrometric method) is suitable, for instance.