作者：梁延鹏, 张力, 钱建平, 朱义年
作者单位：桂林工学院资源与环境工程系, 广西桂林 541004
关键词：汞; 土壤; 植物; 冷原子吸收; 流动注射; 石英管
摘要：
通过灯电流、载液、还原剂浓度及其流速、氩气流速的条件实验来确定仪器的最佳工作状态。然后采用五氧化二钒-硝酸-硫酸体系,在80℃水浴中消解土壤、植物样品,再用流动注射-氢化物发生石英管冷原子吸收系统测定样液中的汞。该方法的分析结果可靠,回收率达93.8%~100.3%,灵敏度为0.29g/L/1%,检出限为0.039g/L,相对标准偏差为(n=5)1.1%~5.3%,线性范围为0.5g/L~50g/L。
Determination of mercury in the soil and plant by hydride generation-cold aas
LIANG Yan-peng, ZHANG Li, QIAN Jian-ping, ZHU Yi-nian
Department of Resource and Environmental Engineering, Guilin University of Technology, Guilin 541004, China
Abstract: The optimal work conditions,such as lamp current,reductant,concentration and flow rate of carrier,flow rate of argon gas,were studied.Vanadic oxide,nitric acid and sulfuric acid were used to decompose soil and plant samples in 80℃ water bath,and then the mercury concentration was determined by FI-HG-CAAS.The analytical result was reliable with the recovery in the range of 93.8%~100.3%,the characteristic concentration of 0.29 μg/L/1%,the detection limit of 0.039 μg/L,the relative standard deviation(n=5) of less than 5.4%,the linear range between 0.5 μg/ and 50 μg/L.
Keywords: Mercury; Soil; Plant; Cold-atomic absorption; Flow injection; Quartz tube
2006, 6(32): 12-14,25 收稿日期: 2006-5-2;收到修改稿日期: 2006-7-17
基金项目: 国家自然科学基金项目(40563001);广西自然科学基金(桂科自0342001-4)
作者简介: 梁延鹏(1980-),男,广西玉林市人,助理实验师,学士,主要从事环境监测分析工作。
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