Nanosemiconductor-based photocatalytic vapor generation systems for subsequent selenium determination and speciation with atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry

CORC > 厦门大学 > 化学化工－已发表论文

	Nanosemiconductor-based photocatalytic vapor generation systems for subsequent selenium determination and speciation with atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry
	Li, Huamin ; Luo, Yacui ; Li, Zhaoxin ; Yang, Limin ; Wang, Qiuqua ; Yang LM(杨利民) ; Wang QQ(王秋泉)
刊名	http://dx.doi.org/10.1021/ac3001995
	2012
关键词	Atomic spectroscopy Fluorescence spectroscopy Formic acid High performance liquid chromatography Inductively coupled plasma mass spectrometry Interfaces (materials) Selenium compounds Titanium dioxide Vapors Yeast
英文摘要	We reported novel Ag-TiO2- and ZrO2-based photocatalytic vapor generation (PCVG) systems as effective sample introduction techniques for further improving the sensitivity of the atomic spectrometric determination of selenium for the first time, in which the conduction band electron served as a 'reductant' to reduce selenium species including SeVI and convert them directly into volatile H2Se, which was easily separated from the sample matrix and underwent more effectively subsequent atomization and/or ionization. These two PCVG systems helped us to overcome the problem encountered in the most conventional KBH 4/OH--H+ system, in that SeVI was hardly converted into volatile selenium species without the aid of prereduction procedures. The limits of detection (LODs) (3蟽) of the four most typical SeIV, SeVI, selenocystine ((SeCys)2), and selenomethionine (SeMet) species were, respectively, down to 1.2, 1.8, 7.4, and 0.9 ng mL-1 in UV/Ag-TiO2-HCOOH, and 0.7, 1.0, 4.2, and 0.5 ng mL-1 in UV/ZrO2-HCOOH with the relative standard deviations (RSDs) lower than 5.1% (n = 9 at 1 渭g mL-1) when using atomic fluorescence spectrometry (AFS) under flow injection mode. They reached 10, 14, 18, and 8 pg mL-1 in UV/Ag-TiO2-HCOOH, and 6, 7, 10, and 5 pg mL-1 in UV/ZrO2-HCOOH with the RSDs lower than 4.4% (n = 9 at 10 ng mL-1) when using inductively coupled plasma mass spectrometry (ICPMS). After the two PCVG systems were validated using certified reference materials GBW(E)080395 and SELM-1, they were applied to determine the total Se in the selenium-enriched yeast sample and used as interfaces between high-performance liquid chromatography (HPLC) and AFS or ICPMS for selenium speciation in the water- and/or enzyme-extractable fractions of the selenium-enriched yeast. 漏 2012 American Chemical Society.
语种	英语
出版者	American Chemical Society
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89544]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Li, Huamin,Luo, Yacui,Li, Zhaoxin,et al. Nanosemiconductor-based photocatalytic vapor generation systems for subsequent selenium determination and speciation with atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry[J]. http://dx.doi.org/10.1021/ac3001995,2012.
APA	Li, Huamin.,Luo, Yacui.,Li, Zhaoxin.,Yang, Limin.,Wang, Qiuqua.,...&王秋泉.(2012).Nanosemiconductor-based photocatalytic vapor generation systems for subsequent selenium determination and speciation with atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry.http://dx.doi.org/10.1021/ac3001995.
MLA	Li, Huamin,et al."Nanosemiconductor-based photocatalytic vapor generation systems for subsequent selenium determination and speciation with atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry".http://dx.doi.org/10.1021/ac3001995 (2012).