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Comparison of interference in chemical, electrochemical and UV-photochemical generation methods of volatile Se species
Journal of Analytical Atomic Spectrometry ( IF 3.4 ) Pub Date : 2017-11-24 00:00:00 , DOI: 10.1039/c7ja00208d
E. Nováková 1, 2, 3, 4, 5 , M. Rybínová 1, 2, 3, 4, 5 , J. Hraníček 1, 2, 3, 4, 5 , P. Rychlovský 1, 2, 3, 4, 5 , V. Červený 1, 2, 3, 4, 5
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We present a comparison of interference in three methods of generation of volatile Se species to compare their performance with regard to matrix effects. The effects of selected hydride forming elements, transition metals and electrolytes are quantified and the similarities and differences between the techniques are compared for individual interferents. The possibility that Co(II), Cr(III) and Ni(II) could be used to increase the response in UV-photochemical generation of volatile Se species is discussed. It was found that the increased sensitivity in the presence of Ni(II) is not due to the increased efficiency of generation but due to processes in the gaseous phase. In general, increased Se signals resulting from modified reactions were associated with alternative vapour generation methods. Electrochemical vapour generation suffers from permanent interference effects located on the cathode, but these were not observed with chemical and UV-photochemical vapour generation. Sb(III) interfered more severely than As(III) irrespective of the method used.

中文翻译:

挥发性硒物种在化学,电化学和紫外光化学生成方法中的干扰比较

我们在三种挥发性硒物种的生成方法中比较干扰,以比较它们在基质效应方面的性能。量化了选定的氢化物形成元素,过渡金属和电解质的影响,并比较了各个干扰物在技术之间的相似性和差异。讨论了Co(II),Cr(III)和Ni(II)可以用于增加挥发性Se物种在UV光化学生成中的响应的可能性。发现在Ni(II)不是由于产生效率的提高,而是由于气相的过程。通常,由修饰反应引起的硒信号增加与替代的蒸气产生方法有关。电化学蒸气的产生受到位于阴极上的永久性干扰的影响,但是化学和紫外线光化学蒸气的产生并未观察到这些干扰。不论使用哪种方法,Sb(III)的干扰都比As(III)严重。
更新日期:2017-11-24
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