DIN 38406-3-2002 德国对水、废水和淤泥的标准检验方法.阳离子(E组).第3部分:配位滴定法测定钙和镁(E3)

标准号：DIN 38406-3-2002
中文标准名称：德国对水、废水和淤泥的标准检验方法.阳离子(E组).第3部分:配位滴定法测定钙和镁(E3)
英文标准名称：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)
标准类型：Z23
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Z23
国际标准分类号：13.060.50
适用范围：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.