原子吸收光谱法测定堆肥中铅、铬的含量

Determination of Pb and Cr in Compost by Atomic Absorption Spectrometry

采用王水-高氯酸消解垃圾堆肥样品。用火焰原子吸收光谱法测定遵义市垃圾堆肥中铅、铬的含量。实验结果表明,遵义市垃圾堆肥中铅含量未超过国家土壤二级标准,而铬的含量比土壤环境质量标准值高。相对标准偏差均小于1.5%,回收率均大于90%。

Pb and Cr in the compost samples of Zun Yi city were digested by aqua regia-perehloric acid, and were determined by flame atomic absorption spectrometry. The results showed that the concentrations of Pb in the compost samples didn＇t exceed National soil standard （level 2）, but the concentrations of Cr in the compost samples were heavier than soil environmental quality standard. The RSD were less than 1.5%, and the recovery rate was more than 90%.