Metal ion-assisted photochemical vapor generation for the determination of lead in environmental samples by Multicolletor-ICPMS

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DOIResolve DOI: http://doi.org/10.1021/acs.analchem.5b00533
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TypeArticle
Journal titleAnalytical chemistry
ISSN0003-2700
Volume87
Issue8
Pages44954502; # of pages: 8
SubjectUV photochemical vapor generation; isotope dilution; Pb; standard additions calibration; multi-collector inductively coupled plasma mass spectrometry
AbstractA novel and sensitive approach for the accurate and precise determination of Pb in environmental samples is presented using transition metal ion-assisted photochemical vapor generation (PVG) for sample introduction with multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) detection. A significant improvement in PVG efficiency of lead is achieved in the presence of transition metal ions (Co(2+) and Ni(2+)) in solutions of 5% (v/v) formic acid. The determination of Pb in digests of sediment or soil samples is readily achieved due to coexisting transition metal ions which facilitate the PVG reaction. The method detection limit of 0.005 ng g(-1) (3σ) using external calibration is comparable to that obtained using hydride generation (HG) ICPMS. However, PVG methodology is simpler, results in lower blanks, and avoids unstable reagents. The accuracy of the proposed method was demonstrated by analysis of several environmental certified reference materials (CRMs; SLRS-5 and SRM1640a river water CRMs and MESS-3, MESS-4, and SRM2702 sediments) with satisfying results. High precision of determination (<0.4% RSD) of Pb in river water and sediments was realized on the basis of isotope dilution calibration.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21275137
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Record identifierd27f2638-2bf5-4c51-b15f-fc4c44ce40e3
Record created2015-05-11
Record modified2016-05-09
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