描述地下水、地表水和饮用水的程序。它也可用于市政和工业原水，前提是它们不含干扰量的重金属。本程序不适用于海水和其他盐浓度较高的类似水域。适用于含量在2至100 mg/l之间的水。对于含量较高的水，应使用稀释样品。

Describes a procedure for ground waters, surface waters and drinking waters. It can also be used for municipal and industrial raw waters, provided they do not contain interfering amounts of heavy metals. The procedure is not applicable to sea waters and other similar waters having a high concentration of salts. It is applicable to waters with contents ranging from 2 to 100 mg/l. For higher contents a diluted sample is to be used.