化肥中重金属元素含量的测定

Determination of Heavy Metals in Fertilizer

建立混合酸消解-火焰原子吸收法测定化肥中4种重金属元素的分析方法,并同时对化肥中4种重金属元素进行测定。样品经混合酸消解,用火焰原子吸收法测量重金属元素。结果对于四种种金属元素,标准曲线相关系数r≥0.99236,线性关系良好;所测化肥中各种重金属元素含量都没有超标,符合国家化肥的安全使用标准。该法消解效果理想,检出限低,线性范围较宽,准确度较高。

A method for determination of heavy metals in fertilizer by flame atomic absorption spectroscopy with mixed acid digestion was developed. The samples were digested with mixed acid and Cu, Zn, Cd, Pb, were quantified by flame atomic absorption spectrometry. Results for all of the analyzed elements, showed that the correlative coefficient of the calibration curves was over 0.99236.The content of four heavy metals didn＇t exceeds the national standard. The method is simple, accurate, and reliable.