程序控温消解-原子吸收光谱法分析土壤中的铅、镉、镍和铬

Determination of Lead,Cadmiun,Nickel,and Chromiun in Soil by Temperature Programed Digestion-Atomic Absorption Spectrometry

1引言近年来由于工业的快速发展和环保意识的缺失,占全国农田总数1/6的耕地受到不同程度的重金属污染。因此,准确测定土壤中的重金属,对指导土壤的重金属修复将起到积极作用。土壤中重金属的仪器分析方法主要包括X射线荧光光谱法[1]、原子发射光谱法[2]、原子吸收光谱法[3]以及电感耦合等离子体质谱法[4]。

A temperature programed digestion-atomic absorption spectrometry method was established for the determination of lead,cadmiun,nickel,and chromiun in soil.The temperature program for digestion was set as 80 ℃ for 1 h,120 ℃ for 2 h,and 300 ℃ for the remove of acid solution.The result shows that the average recoveries for lead,cadmiun,nickel,and chromiun were 100.4%,99.4%,95.0%,and 94.0%,respectively.Verified by the standard samples GBW07406 and GBW07407,the established method was found to have a good accuracy.In compariaon with the traditional digestion method,the established method in this atudy was proved to have better accuracy and precision.This method was also proved to have good operability and it＇s easy to spread.