曹芳红, 陈晓霞, 丁锦春. 微波消解-石墨炉原子吸收光谱法测定土壤中铅和镉[J]. 环境与职业医学, 2012, 29(8): 498-500.
引用本文: 曹芳红, 陈晓霞, 丁锦春. 微波消解-石墨炉原子吸收光谱法测定土壤中铅和镉[J]. 环境与职业医学, 2012, 29(8): 498-500.
CAO Fang-hong , CHEN Xiao-xia , DING Jin-chun . Determination of Lead and Cadmium in Soil by Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry[J]. Journal of Environmental and Occupational Medicine, 2012, 29(8): 498-500.
Citation: CAO Fang-hong , CHEN Xiao-xia , DING Jin-chun . Determination of Lead and Cadmium in Soil by Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry[J]. Journal of Environmental and Occupational Medicine, 2012, 29(8): 498-500.

微波消解-石墨炉原子吸收光谱法测定土壤中铅和镉

Determination of Lead and Cadmium in Soil by Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry

  • 摘要: 目的 建立微波消解-石墨炉原子吸收光谱测定土壤中铅和镉的分析方法。

    方法 土壤样品研磨过100目筛,用硝酸-氢氟酸-过氧化氢混合消解液微波消解后,石墨炉原子吸收光谱测定。

    结果 铅浓度为5.0~40.0 μg/L、镉浓度为0.20~2.00 μg/L 时,石墨炉原子吸收光谱测定土壤中铅和镉的方法线性良好,相关系数均为0.999 9。铅和镉的方法定量检出限分别为5.0、0.040 mg/kg。加标回收率为90.0%~110.0%,相对标准偏差为4.1%~6.9%,标样的测定结果在不确定度范围内。

    结论 该方法简便、快速,基体干扰少,结果准确,适用于土壤中铅、镉含量的测定。

     

    Abstract: Objective To establish a method to measure lead and cadmium in soil by microwave digestion-graphite furnace atomic absorption spectrometry (FGAAS).

    Methods Soil samples were ground to pass 100-mesh sieve, digested using HNO3-HF-H2O2 under microwave treatment and determined by GFAAS.

    Results When the lead concentrations were in the range of 5.0-40.0 μg/L and the cadmium concentrations were in the range of 0.20-2.00 μg/L, the linearity of this method was good, with a correlation coefficient of 0.999 9. The detection limits of lead and cadmium were 5.0 and 0.040 mg/kg respectively. The recovery rate was 90.0%-110.0%. The relative standard deviation was 4.1%-6.9%. The determination results of standard samples were within the uncertainty.

    Conclusion The method is characterized by simple, rapid, and little disturbance with high accuracy; therefore, it is suitable for regular measurement of lead and cadmium in soil.

     

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