Enhancement of emission from indium in flowing liquid anode atmospheric pressure glow discharge using organic media.
Enhancement of emission from indium in flowing liquid anode atmospheric pressure glow discharge using organic media.
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DOI：
10.1016/j.talanta.2019.06.015
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发表时间：
2019-11
期刊：
影响因子：
6.1
通讯作者：
Krzysztof Greda;S. Burhenn;P. Pohl;J. Franzke
中科院分区：
文献类型：
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作者：
Krzysztof Greda;S. Burhenn;P. Pohl;J. Franzke
添加低分子量有机化合物，即：研究了流动液阳极常压辉光放电光谱法（FLA-APGD-OES）测定In的发光特性。结果表明，少量加入CH3OH或C2H5OH （0.5%, v/v）可使In 451.1 nm原子线的强度提高30倍以上。观察到的发射增强不仅是由于分析物从液体样品到等离子体相的输运效率的提高（从19%增加到35%），而且是由于一些其他因素，可能是由于雾化/激发条件的改善。所建立的FLA-APGD-OES方法对In的检出限极低，仅为0.21 μg L−1（使用小型化光谱仪）或0.030 μg L−1（使用高分辨率光谱仪）。此外，还证明了醇的加入显著降低了几种干扰物质的基质效应，例如：Ag、Cu、Pb和Zn，只有在Na的情况下才有抗干扰效果。由于醇类的加入，只观察到In的强度提高，而其他元素如Ag、Cd、Hg、Pb、Tl和Zn则没有。
The effect of addition of low molecular weight organic compounds,i.e.acids, salts and alcohols, on the emission measured from In with flowing liquid anode atmospheric pressure glow discharge optical emission spectrometry (FLA-APGD-OES) was studied. It was revealed that a small addition of CH3OH or C2H5OH (0.5%, v/v) enhanced the intensity of In 451.1 nm atomic line over 30-times. The observed boosting of emission was caused both not only by promotion of the analyte transport efficiency from the liquid sample to the plasma phase (increased from 19% to 35%) but also due to some other factors, presumably the improvement of atomization/excitation conditions. The developed FLA-APGD-OES method offered a very low detection limit of In which was 0.21 μg L−1(using a miniaturized spectrometer) or even 0.030 μg L−1(using a high-resolution spectrometer). Furthermore, it was demonstrated that addition of alcohols significantly reduced the matrix effects from several interfering species,e.g.Ag, Cu, Pb and Zn, and only in case of Na, the anti-interference effect was observed. The intensity improvement which resulted from the addition of alcohols, was observed for In only and it did not occur for other elements such as Ag, Cd, Hg, Pb, Tl and Zn.