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Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation
Cheng, Junqi; Li, Qing; Zhao, Mingyue; Wang, Zheng
2019-10-24
Source PublicationANALYTICA CHIMICA ACTA
ISSN0003-2670
Volume1077Pages:107
SubtypeArticle
AbstractA novel method for the determination of ultratrace Pb in seawater by solution-cathode glow discharge atomic emission spectrometry (SCGD-AES) coupled with hydride generation (HG) has been developed. In the SCGD process, the hollow Ti tube, which can introduce gas instead of a solid tungsten rod is used as a discharge anode and combined with hydride generator. HG technology can not only separate Pb from a seawater matrix and reduce the matrix interference on detection, but can also significantly improve the transfer and atomization efficiencies for SCGD-AES. The optimum working conditions for HG and SCGD-AES for quantitative analysis of Pb were determined as 1% H2C2O4 as the masking agent and addition of 3% formic acid to increase Pb volatilization. The limit of detection (LOD) for Pb was decreased by two orders of magnitude in comparison to the SCGD-AES process alone. Under optimal conditions, the LOD for Pb was 0.17 mu g L-1, and the relative standard deviation was 2.1% (n = 11) for 100 mu g L-1 Pb in artificial seawater. The proposed quantification method was verified using a seawater reference material (BWQ7001-2016), and the obtained results agreed well with certified values. Finally, the approach was used to quantitatively analyse Pb in seawater, and the results agreed well with those obtained by inductively coupled plasma mass spectrometry. The recoveries of standard addition were between 96.0% and 103.0%. (C) 2019 Elsevier B.V. All rights reserved.
KeywordHydride generation Solution-cathode glow discharge-atomic emission spectrometry Lead Seawater
DOI10.1016/j.aca.2019.06.003
Language英语
WOS Research AreaChemistry
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26760
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Cheng, Junqi,Li, Qing,Zhao, Mingyue,et al. Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation[J]. ANALYTICA CHIMICA ACTA,2019,1077:107.
APA Cheng, Junqi,Li, Qing,Zhao, Mingyue,&Wang, Zheng.(2019).Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation.ANALYTICA CHIMICA ACTA,1077,107.
MLA Cheng, Junqi,et al."Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation".ANALYTICA CHIMICA ACTA 1077(2019):107.
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