DIN 38413-5-1990 德国检验水、废水和污泥的标准方法.专用组分(P 组).第5部分:采用极谱分析法(P 5)对乙二胺四乙酸(EDTA)和氮川三醋酸(NTA)的测定
German standard methods for the examination of water, waste water and sludge; individual constituents (group P); determination of ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) by polarography (P 5)