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Determination of Trace Bismuth in Environmental Waters by ICP‐MS with Cobalt Ion‐Assisted Photochemical Vapour Generation
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2020-03-06 , DOI: 10.1111/ggr.12319 Ying Yu 1 , Qian Zhao 1 , Haolin Bao 1 , Qing Mou 1 , Zeming Shi 1 , Youliang Chen 1 , Ying Gao 1
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2020-03-06 , DOI: 10.1111/ggr.12319 Ying Yu 1 , Qian Zhao 1 , Haolin Bao 1 , Qing Mou 1 , Zeming Shi 1 , Youliang Chen 1 , Ying Gao 1
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With increasing use of bismuth in industry, a better understanding of its environmental behaviour is required, including an improved knowledge of its background concentration range in (non‐saline) freshwaters. However, the poor analytical sensitivity of previous methods may lead to inaccurate measurement results for Bi3+ in environmental samples. In this work, cobalt ion‐assisted photochemical vapour generation (PVG) was developed for the detection of trace Bi with inductively coupled plasma‐mass spectrometry (ICP‐MS) measurement. The volatile species of Bi was found to be (CH3)3Bi generated under UV irradiation in the presence of formic acid, acetic acid and Co2+. The major parameters potentially influencing the detection of Bi were investigated. Under optimised conditions, the limit of detection (3s , n = 11) of the proposed method was 0.3 ng l−1. The analytical sensitivity was enhanced about 70‐fold for Bi3+ compared with that using classic pneumatic nebulisation of ICP‐MS. Furthermore, the proposed method showed better analytical sensitivity and anti‐interference ability towards co‐existing ions compared with ferric ion‐assisted PVG systems. The accuracy of the proposed method was evaluated by analysis of environmental water samples and certified reference materials with satisfactory results.
中文翻译：
ICP-MS结合钴离子辅助光化学蒸气发生法测定环境水中的痕量铋
随着工业中铋的使用不断增加，需要对铋的环境行为有更好的了解，包括对（非盐）淡水中其本底浓度范围的了解增加。但是，先前方法的较差的分析灵敏度可能导致环境样品中Bi 3+的测量结果不准确。在这项工作中，开发了钴离子辅助光化学蒸气产生（PVG）来通过电感耦合等离子体质谱（ICP-MS）测量来检测痕量Bi。发现Bi的挥发性物质是在甲酸，乙酸和Co 2+的存在下于紫外线照射下生成的（CH 3）3 Bi。。研究了可能影响Bi检测的主要参数。在最佳条件下，该方法的检出限（3 s，n = 11）为0.3 ng l -1。与传统的ICP-MS气动雾化相比，Bi 3+的分析灵敏度提高了约70倍。此外，与三价铁离子辅助的PVG系统相比，该方法对共存离子具有更好的分析灵敏度和抗干扰能力。通过分析环境水样和经认证的参考物质评估了所提出方法的准确性，结果令人满意。
更新日期：2020-03-06
中文翻译：
ICP-MS结合钴离子辅助光化学蒸气发生法测定环境水中的痕量铋
随着工业中铋的使用不断增加，需要对铋的环境行为有更好的了解，包括对（非盐）淡水中其本底浓度范围的了解增加。但是，先前方法的较差的分析灵敏度可能导致环境样品中Bi 3+的测量结果不准确。在这项工作中，开发了钴离子辅助光化学蒸气产生（PVG）来通过电感耦合等离子体质谱（ICP-MS）测量来检测痕量Bi。发现Bi的挥发性物质是在甲酸，乙酸和Co 2+的存在下于紫外线照射下生成的（CH 3）3 Bi。。研究了可能影响Bi检测的主要参数。在最佳条件下，该方法的检出限（3 s，n = 11）为0.3 ng l -1。与传统的ICP-MS气动雾化相比，Bi 3+的分析灵敏度提高了约70倍。此外，与三价铁离子辅助的PVG系统相比，该方法对共存离子具有更好的分析灵敏度和抗干扰能力。通过分析环境水样和经认证的参考物质评估了所提出方法的准确性，结果令人满意。
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