UV photochemical vapor generation and in situ preconcentration for determination of ultra-trace nickel by flow injection graphite furnace atomic absorption spectrometry

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1039/b909962j
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Name affiliation
  1. National Research Council of Canada. NRC Institute for National Measurement Standards
FormatText, Article
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
1364-5544
Volume24
Issue10
Pages1452–
Abstract
A new and sensitive method is described for the on-line determination and preconcentration of ultra-trace nickel using the coupling of a flow injection system with graphite furnace atomic absorption spectrometry. The method is based on photochemical generation of Ni(CO)4 and its trapping on the surface of a graphite furnace, the latter accomplished with approximately 35% efficiency by exposing a solution of Ni(II), containing formic acid, to UV irradiation. Optimum conditions for generation and trapping, as well as interferences from concomitant elemental ions, were investigated. A characteristic mass of 10 pg and LOD of 8 pg mL−¹ were obtained based on a 2 ml sample volume. The LOD can be further enhanced by increasing sample volume and reaction temperature, or by addition of copper ions. The precision was better than 3% (RSD) at 1 ng mL−¹. Environmental Certified Reference Materials were analyzed to validate the accuracy of the proposed method, including SLRS-4 (river water), MESS-3 (marine sediment), TORT-2 (lobster hepatopancreas) and DOLT-3 (fish liver tissue).
Publication date
LanguageEnglish
Peer reviewedYes
NPARC number21277194
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Record created2016-01-05
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