GFAAS Determination of Lead and Cadmium in Soil
摘 要
土壤样品经硝酸、氢氟酸和过氧化氢加热消解,采用石墨炉原子吸收光谱法测定其中铅和镉的含量。以磷酸铵作为基体改进剂,铅和镉的灰化温度分别为400 ℃,250 ℃,原子化温度分别为2 100 ℃,1 800 ℃。铅和镉的质量浓度分别在0.50~50.0,0.10~2.5 μg·L-1范围内与其吸光度呈线性关系,检出限依次为6.5,0.4 pg。应用此法分析了4个土壤标准样品,测定值与标准值相符,相对标准偏差(n=6)分别在1.5%~6.3%和2.3%~5.1%之间。铅、镉的加标回收率分别在85.4%~103.2%,91.5%~102.3%之间。
Abstract
Sample of soil was digested with a mixture of HNO3, HF and H2O2, and the contents of lead and cadmium in sample solution was determined by GFAAS. Ammonium phosphate was used as matrix modifier. The ashing and the atomization temperature for Pb were 400 ℃ and 2 100 ℃, and for Cd were 250 ℃ and 1 800 ℃ respectively. Linear relationships between values of absorbance and mass concentration of Pb and Cd were obtained in the ranges of 0.50-50.0 and 0.10-2.5 μg·L-1, with detection limits of 6.5 and 0.4 pg, respectively. Four CRM′s of soil were analyzed by the proposed method, giving results in consistency with the certified values and values of RSD′s (n=6) in the ranges of 1.5%-6.3% for Pb and 2.3%-5.1% for Cd. Values of recovery obtained by standard addition method were found in the range of 85.4%-103.2% for Pb and 91.5%-102.3% for Cd.
中图分类号 O657.31
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收稿日期 2010/12/17
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联系人作者王士贺(wshsir@sohu.com)
备注王士贺(1967-),男,辽宁丹东人,副教授,从事化学分析技术研究。
引用该论文: WANG Shi-he,WANG Zhong-wei. GFAAS Determination of Lead and Cadmium in Soil[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2012, 48(1): 30~31
王士贺,王忠伟. 石墨炉原子吸收光谱法测定土壤中铅、镉含量[J]. 理化检验-化学分册, 2012, 48(1): 30~31
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参考文献
【1】王丽慧,王翠红,叶丽丽,等.城郊蔬菜地土壤铅和镉污染污染研究进展[J].湖南农业科学, 2009(5):50-52.
【2】李桂丽,苏红霞,段敏,等.西安市蔬菜中重金属污染分析评价[J].西北植物学报, 2008,28(9):1904-1909.
【3】卢春香,邓程君,杨宝良.原子吸收-石墨炉法测定食品中重金属元素的方法研究[J].中国饲料, 2008(18):34-36..
【4】倪小英,王玉枝.微波消解-石墨炉原子吸收法测定大米中的铅镉[J].微量元素与健康研究, 2008,25(5):44-46.
【5】李海玲,黄华芳,任春霞,等.现代土壤铅污染监测的测定方法[J].湖州师范学院学报, 2005,27(1):51-54.
【2】李桂丽,苏红霞,段敏,等.西安市蔬菜中重金属污染分析评价[J].西北植物学报, 2008,28(9):1904-1909.
【3】卢春香,邓程君,杨宝良.原子吸收-石墨炉法测定食品中重金属元素的方法研究[J].中国饲料, 2008(18):34-36..
【4】倪小英,王玉枝.微波消解-石墨炉原子吸收法测定大米中的铅镉[J].微量元素与健康研究, 2008,25(5):44-46.
【5】李海玲,黄华芳,任春霞,等.现代土壤铅污染监测的测定方法[J].湖州师范学院学报, 2005,27(1):51-54.
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