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    石墨炉原子吸收光谱法测定海产品中镉含量

    GFAAS Determination of Cadmuim in Seafoods

    • 摘要: 采用固体进样-石墨炉原子吸收光谱法测定海产品中镉的含量。以1.0 g·L-1硝酸铅溶液为基体改进剂,灰化温度为950 ℃,原子化温度为1 900 ℃。镉的进样量在0.05~0.2 ng之间与其吸光度呈线性关系,检出限(3s)为0.015 ng。应用此法分析了海产品样品,加标回收率在60.0%~90.0%之间,测定结果与液体进样-石墨炉原子吸收光谱法测定结果基本一致。

       

      Abstract: A method of GFAAS with solid sample introduction was proposed for the determination of cadmium in seafood. A solution of 1.0 g·L-1 Pb(NO3)2 was used as matrix modifier, and temperatures selected for ashing and atomization were 950 ℃ and 1 900 ℃ respectively. Linear relationship between values of absorbance and mass of cadmium was obtained in the range of 0.05-0.2 ng, with detection limit (3s) of 0.015 ng. The proposed method was used in the analysis of sample of seafood, and results obtained were in consistency with those obtained by liquid sample introduction GFAAS. Values of recovery found by standard addition method were in the range of 60.0%-90.0%.

       

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