固体热解塞曼原子吸收光谱法在毛发痕量汞分析中的应用

Determination of Mercury in Hair by Atomic Absorption Spectrometry with Pyrolysis

建立了一种采用固体热解塞曼原子吸收光谱快速测定毛发中痕量汞的方法 ,样品不需要经过消解即可直接测定。在优化的实验条件下 ,方法的相对标准偏差为3.9 %(峰面积)和7.2%(峰高) ,检出限为26ng/g(3σ) ,回收率为94 %～103 %。使用标准参考物质进行对照分析和通过与ICP -MS分析结果进行比较 ,结果令人满意。应用本法通过对实验动物样本的检测表明 。

A rapid and simple method for the determination of total mercury in hair by using atomic absorpˉtion spectrometry with pyrolysis is developed.No sample digestion was needed.Under optimum conditions,the reproducibilities of the method were3.9%for peak area and7.2%for peak height,respectively.The detection limit was26ng/g(3σ)and the recovery was within the range of94%～103%.Several Standard Reference Materials were analyzed and the results obtained agreed well with the certified values.The perforˉmances of the method were compared with those of the inductively coupled plasma-mass spectrometry(ICP-MS)and excellent agreements were observed.