本欧洲标准规定了用王水提取后用电感耦合等离子体原子发射光谱法（ICP-AES）测定肥料中镉，铬，镍和铅含量的方法。定量限制取决于样品基质和仪器，但大致可以预计Cd为0.3 mg/kg，Cr，Ni和Pb为1 mg/kg。 注意由于Cu，Fe和Mn的显着干扰，对于这些微量营养素的高浓度（>/= 10％）的肥料基质，无法报告有效的结果

This European Standard specifies a method for the determination of the content of cadmium, chromium, nickel and lead in fertilizers with inductively coupled plasma atomic emission spectrometry (ICP-AES) after extraction with aqua regia. Limits of quantification are dependent on the sample matrix as well as on the instrument, but can roughly be expected to be 0,3 mg/kg for Cd and 1 mg/kg for Cr, Ni and Pb. NOTE Due to significant interference from Cu, Fe and Mn, no valid results can be reported using this method for fertilizer matrices containing high concentrations (>/= 10 %) of these micro-nutrients.