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Simultaneous determination of noble metals (Rh, Pd, Ir, Pt, and Au) in environmental samples by nebulized film dielectric barrier discharge vapor generation coupled with inductively coupled plasma mass spectrometry
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-09-08 , DOI: 10.1039/d0ja00343c Qian He 1, 2, 3, 4, 5 , Xianxian Wang 3, 5, 6, 7 , Huijun He 1, 2, 3, 4, 5 , Jing Zhang 8, 9, 10, 11, 12
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-09-08 , DOI: 10.1039/d0ja00343c Qian He 1, 2, 3, 4, 5 , Xianxian Wang 3, 5, 6, 7 , Huijun He 1, 2, 3, 4, 5 , Jing Zhang 8, 9, 10, 11, 12
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A novel sensitive vapor generation sampling method, nebulized film dielectric barrier discharge (NFDBD) coupled with inductively coupled plasma mass spectrometry (ICP-MS), was developed in this work for simultaneous determination of noble metals (Rh, Pd, Ir, Pt, and Au). In the presence of formic acid, a 5–11 fold improvement in the sampling efficiency of Rh, Pd, Ir, Pt, and Au by NFDBD was achieved compared with conventional nebulization. Under the optimized conditions, the relative standard deviation (RSD) of Rh, Pd, Ir, Pt, and Au determined at 5 μg L−1 was between 1.4% and 4.3%, and the detection limits (LODs) of Rh, Pd, Ir, Pt, and Au were between 0.1 ng L−1 and 0.7 ng L−1. This NFDBD sampling technique not only operates with no requirement of unstable reagents, easy coupling with flow injection, along with high tolerance for coexisting ions, but also achieves lower LODs than the Na(K)BH4–acid vapor generation system and UV photochemical vapor generation system for noble metal determination. This work also extends the scope of elements that can be determined by DBD plasma vapor generation and provides a highly efficient analytical approach for the determination of Rh, Pd, Ir, Pt, and Au in environmental samples, especially in natural water.
中文翻译：
雾化膜介电势垒放电蒸气发生-电感耦合等离子体质谱法同时测定环境样品中的贵金属（Rh，Pd，Ir，Pt和Au）
在这项工作中，开发了一种新颖的灵敏的蒸汽发生采样方法，雾化膜介电势垒放电（NFDBD）和电感耦合等离子体质谱（ICP-MS），用于同时测定贵金属（Rh，Pd，Ir，Pt和金）。与常规雾化相比，在存在甲酸的情况下，通过NFDBD对Rh，Pd，Ir，Pt和Au的采样效率提高了5-11倍。在最佳条件下，测定的5μgL -1处的Rh，Pd，Ir，Pt和Au的相对标准偏差（RSD）在1.4％至4.3％之间，Rh，Pd， Ir，Pt和Au在0.1 ng L -1和0.7 ng L -1之间。这种NFDBD采样技术不仅不需要不稳定的试剂，易于与流动注射耦合，而且对共存离子具有很高的耐受性，而且与Na（K）BH 4-酸蒸汽产生系统和UV光化学蒸汽相比，其LOD更低。贵金属测定系统。这项工作还扩展了可以通过DBD等离子蒸气产生确定的元素的范围，并提供了一种高效的分析方法来测定环境样品（尤其是天然水中）中的Rh，Pd，Ir，Pt和Au。
更新日期：2020-11-03
中文翻译：
雾化膜介电势垒放电蒸气发生-电感耦合等离子体质谱法同时测定环境样品中的贵金属（Rh，Pd，Ir，Pt和Au）
在这项工作中，开发了一种新颖的灵敏的蒸汽发生采样方法，雾化膜介电势垒放电（NFDBD）和电感耦合等离子体质谱（ICP-MS），用于同时测定贵金属（Rh，Pd，Ir，Pt和金）。与常规雾化相比，在存在甲酸的情况下，通过NFDBD对Rh，Pd，Ir，Pt和Au的采样效率提高了5-11倍。在最佳条件下，测定的5μgL -1处的Rh，Pd，Ir，Pt和Au的相对标准偏差（RSD）在1.4％至4.3％之间，Rh，Pd， Ir，Pt和Au在0.1 ng L -1和0.7 ng L -1之间。这种NFDBD采样技术不仅不需要不稳定的试剂，易于与流动注射耦合，而且对共存离子具有很高的耐受性，而且与Na（K）BH 4-酸蒸汽产生系统和UV光化学蒸汽相比，其LOD更低。贵金属测定系统。这项工作还扩展了可以通过DBD等离子蒸气产生确定的元素的范围，并提供了一种高效的分析方法来测定环境样品（尤其是天然水中）中的Rh，Pd，Ir，Pt和Au。
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