Ultratrace Pb determination in seawater by solution-cathode glow discharge-atomic emission spectrometry coupled with hydride generation

doi:10.1016/j.aca.2019.06.003

	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
刊名	ANALYTICA CHIMICA ACTA
	2019-10-24
卷号	1077 页码:107
关键词	Hydride generation Solution-cathode glow discharge-atomic emission spectrometry Lead Seawater
ISSN号	0003-2670
DOI	10.1016/j.aca.2019.06.003
文献子类	Article
英文摘要	A 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.
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26760]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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.