ICP-AES法分析测定多种鱼肉中有害元素的研究

采用湿法消解处理鱼肉样品，用ICP-AES法测定12种鱼肉中的有害元素镉、砷、铅和汞。对ICP仪器操作参数射频发生器RF功率、雾化压力、试液提升量进行了优化选择，并对镉、砷、铅和汞元素在特定波长下光谱进行了干扰研究，建立IECs模型校正系数。结果表明：对这些电离电位能较高的元素适当增加射频发生器RF功率和降低雾化器压力，可提高各元素信背比，降低检出限。铬、铜、砷、锡和钠元素对所测元素产生光谱干扰, 砷元素在189.042 nm、铅元素在220.353 nm、镉元素在228.802 nm、汞元素184.950 nm处主要谱线干扰分别是：Cr，Cu，As，Sn和Na元素。淡水鱼肉类主要污染源为铅元素, 海水鱼肉类主要污染源为砷元素。

Determination of Harmful Elements in Various Fish Tissues by ICP-AES

Twelve kinds of fish tissues were wetly decomposed and the harmful elements of Cd,As,Pb and Hg were determined by ICP-AES method in the present paper.The techniques for operating ICP instrument were optimized,spectral interference for elements in special wavelength range was studied,and the correction factor of IECs model was established.The results indicated that the signal to noise ratio and detection limit for elements with higher ionization potential energy may be improved by increasing the radio generator power properly and reducing the nebulizer pressure.There were Cr,Cu,As,Sn and Na elements that mainly disturbed the determined elements such as As(189.042 nm),Pb(220.353 nm),Cd(228.802 nm) and Hg(184.950 nm).The primary contaminating elements in tissues of freshwater fish and seawater fish were Pb and As respectively.