High-efficiency photooxidation vapor generation of osmium for determination by inductively coupled plasma-optical emission spectrometry
High-efficiency photooxidation vapor generation of osmium for determination by inductively coupled plasma-optical emission spectrometry
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DOI：
10.1039/c3ja50323b
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发表时间：
2014-02
影响因子：
3.4
通讯作者：
Zhenli Zhu;Dong He;Chunying Huang;Hongtao Zheng;Suicheng Zhang;Shenghong Hu
中科院分区：
文献类型：
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作者：
Zhenli Zhu;Dong He;Chunying Huang;Hongtao Zheng;Suicheng Zhang;Shenghong Hu
建立了一种高效光氧化蒸气发生（POVG）电感耦合等离子体发射光谱法（ICP-OES）测定水中锇的方法。锇在纯水（中性）介质中通过简单地暴露于紫外线照射而容易地转化为挥发性四氧化锇，从而能够在不使用任何化学氧化剂的情况下快速有效地生成。采用自制的高效光氧化紫外光反应器，其最佳发生效率达到96.1%。考察了背景基质、样品流速、载气流速和加热温度对测定的影响。在优化的条件下，用所提出的POVG方法获得的检测限（LOD）为0.2 ng mL−1。浓度为2 μg mL−1时，精密度为1.3%（RSD，n = 6）。方法简便、快速、无污染、无严重干扰。这为从水样中以绿色方式生成锇蒸气提供了一种新的途径。
A high-efficiency photooxidation vapor generation (POVG) method for the determination of osmium in water by inductively coupled plasma-optical emission spectrometry (ICP-OES) has been developed. Osmium is readily converted to volatile osmium tetraoxide in plain (neutral) water medium by simply exposing to UV irradiation, enabling fast and effective generation without the use of any chemical oxidizing agents. An optimum generation efficiency of 96.1% was achieved by the use of a home-made high efficiency photooxidation UV reactor. The influences of the background matrices, sample flow rate, carrier gas flow rate, and heating temperature were investigated. Under optimized conditions, a limit of detection (LOD) of 0.2 ng mL−1 was obtained with the proposed POVG method. A precision of 1.3% (RSD, n = 6) was achieved at a concentration of 2 μg mL−1. The method is simple, rapid, free of contamination, and not subject to severe interferences. It provides a novel approach to the generation of Os vapor from water samples in a green manner.