Determination of Heavy Metals in Artificial Soil on Railway Rock-Cut Slopes by Microwave Digestion-AAS
CHEN Zhao-qiong1, 2, FANG Chen1, AI Ying-wei1*, GAO Hong-ying1, PAN Dan-dan1, LI Xin-yue1
1. Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu 610064, China 2. Chengdu Medical College, Chengdu 610083, China
Abstract：The purpose of this paper is as follows: (1) Optimizing the parameters of microwave digestion-atomic absorption spectroscopy (AAS) and establishing method for the determination of heavy metals in artificial soils. (2) Evaluating heavy metal pollution conditions in artificial soil samples from railway rock-cut slopes. The results showed that the mixture of HNO3-H2O2-HF was found to have the best digestion efficiency; under the optimized conditions, the recoveries of the method ranged from 95% to 105%; the measurement precision and the relative deviation were less than 4% and 5%, respectively; the concentrations of Cd, Pb and Zn were significantly higher in the artificial soil on railway rock-cut slope than in the control soil, and they were 4.7, 1.3 and 1.2 times as much as the control soil, respectively; compared to the contents of Cr, Cu and Fe in control soils, there was no significant difference. This research will provide a reliable method for determining metal elements in artificial soils on rock-cut slopes and a theoretical basis for the management of the railway rock-cut slopes.
Key words：Microwave digestion;AAS;Artificial soil;Heavy metal elements
陈朝琼1，2，房 晨1，艾应伟1*，高宏英1，潘丹丹1，李新月1 . 微波消解/AAS测定铁路岩石边坡创面人工土壤中的重金属含量 [J]. 光谱学与光谱分析, 2013, 33(08): 2215-2218.
CHEN Zhao-qiong1, 2, FANG Chen1, AI Ying-wei1*, GAO Hong-ying1, PAN Dan-dan1, LI Xin-yue1 . Determination of Heavy Metals in Artificial Soil on Railway Rock-Cut Slopes by Microwave Digestion-AAS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(08): 2215-2218.
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