| UV Photochemical vapor generation sample introduction for determination of Ni, Fe, and Se in biological tissue by isotope dilution ICPMS. | |
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MedLine Citation:
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PMID: 20364828 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A novel, sensitive method is described for the accurate determination of Ni, Se, and Fe in biological tissues by isotope dilution inductively coupled plasma mass spectrometry (ID ICPMS) based on sample introduction arising from online UV photochemical vapor generation (UV-PVG). Volatile species of Ni, Se, and Fe were liberated from a formic acid medium following exposure to a UV source. Sensitivities were enhanced 27- to 355-fold compared to those obtained using pneumatic nebulization sample introduction. Although precision was slightly degraded (a factor of 2) with ultraviolet photochemical mediated vapor generation (UV-PVG), limits of detection (LODs) of 0.18, 1.7, and 1.0 pg g(-1) for Ni, Se, and Fe, respectively, based on an external calibration, provided 28-, 150-, and 29-fold improvements over that realized with conventional pneumatic solution nebulization. Method validation was demonstrated by determination of Ni, Se, and Fe in biological tissue certified reference materials (CRMs) TORT-2 and DORM-3. Concentrations of 2.33 +/- 0.03, 5.80 +/- 0.28, and 109 +/- 2 microg g(-1) (1SD, n = 4) and 1.31 +/- 0.04, 3.35 +/- 0.18, and 353 +/- 5 microg g(-1) (1SD, n = 4) for Ni, Se, and Fe, respectively were obtained in TORT-2 and DORM-3, in good agreement with certified values. |
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Authors:
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Chengbin Zheng; Lu Yang; Ralph E Sturgeon; Xiandeng Hou |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Analytical chemistry Volume: 82 ISSN: 1520-6882 ISO Abbreviation: Anal. Chem. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-30 Completed Date: 2010-08-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370536 Medline TA: Anal Chem Country: United States |
Other Details:
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Languages: eng Pagination: 3899-904 Citation Subset: IM |
Affiliation:
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Institute for National Measurement Standards, National Research Council Canada, Ottawa, Ontario, Canada, K1A 0R6. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Gases / analysis* Hepatopancreas / chemistry Indicator Dilution Techniques Iron / chemistry* Nephropidae / chemistry* Nickel / chemistry* Selenium / chemistry* Ultraviolet Rays* Volatilization |
| Chemical | |
Reg. No./Substance:
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0/Gases; 7439-89-6/Iron; 7440-02-0/Nickel; 7782-49-2/Selenium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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