双铂网雾化和超声雾化进样系统对ICP-AES分析性能的影响  

Analytical Figures of Merit of Hildebrand Grid and Ultrasonic Nebulizations in Inductively Coupled Plasma Atomic Emission

作　　者：田梅[1] 韩小元[1] 卓尚军[2] 张瑞荣[1] 

机构地区：[1]西北核技术研究所,陕西西安710024 [2]中国科学院上海硅酸盐研究所,上海200050

出　　处：《光谱学与光谱分析》2012年第5期1376-1380,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21102157);中国科学院创新方法研究项目(O87YQ1110G);科技部创新方法专项项目(2009IM031100)资助

摘　　要：从元素检出限、基体效应、ICP稳健性及记忆效应方面实验研究了双铂网雾化与超声雾化两种进样方式对ICP-AES分析性能的影响。结果表明,在超声雾化进样条件下,Cu,Pb,Zn,Cr,Cd,Ni的检出限较双铂网雾化的检出限降低了6～23倍;在基体效应方面,超声雾化进样时基体对元素原子及离子谱线强度的影响均较双铂网雾化系统明显,元素谱线增强/减弱的幅度受元素谱线、基体组成和浓度的影响;Ca和Mg基体对谱线强度的影响强于K和Na基体;离子谱线受基体的影响明显强于原子谱线。超声雾化系统进样时ICP的稳健性要劣于双铂网雾化系统,而且超声雾化系统的记忆效应较双铂网雾化器严重。Hildebrand grid nebulizer is a kind of improved Babington nebulizer,which can nebulize solutions with high total dissolved solids.And the ultrasonic nebulizer（USN） possesses advantage of high nebulization efficiency and fine droplets.In the present paper,the detection limits,matrix effects,ICP robustness and memory effects of Hildebrand grid and ultrasonic nebulizers for ICP-AES were studied.The results show that the detection limits using USN are improved by a factor of 6~23 in comparison to Hildebrand grid nebulizer for Cu,Pb,Zn,Cr,Cd and Ni.With the USN the matrix effects were heavier,and the degree of intensity enhancement and lowering depends on the element line,the composition and concentrations of matrices.Moreover,matrix effects induced by Ca and Mg are more significant than those caused by Na and Mg,and intensities of ionic lines are affected more easily than those of atomic lines.At the same time,with the USN ICP has less robustness.In addition,memory effect of the USN is also heavier than that of Hildebrand grid nebulizer.

关 键 词：双铂网雾化 超声雾化 ICP-AES 

分 类 号：O657.3[理学—分析化学]