Thin film hydride generation: determination of ultra-trace copper by flow injection in situ hydride trapping graphite furnace AAS

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DOIResolve DOI: http://doi.org/10.1039/C002360D
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TypeArticle
Journal titleAnalytical Atomic Spectrometry
Volume25
Issue7
Pages11591165; # of pages: 7
AbstractA novel system which significantly enhances copper hydride generation efficiency was used for the determination of trace copper by coupling a flow injection system to a graphite furnace for in situ collection of the analyte and subsequent AAS detection. A single device integrated the functions of hydride generator and gas liquid separator. Solutions of the sample containing 0.0005% (m/v) phenanthroline and 1% formic acid were merged with tetrahydroborate reductant to yield a thin film wetting a reaction surface from which product vapor was efficiently liberated and transported to the heated furnace. Optimum operating conditions provided for a generation/transport/collection efficiency of 8–12%. Interferences from common transition and noble metals were effectively eliminated. A limit of detection of 100 pg ml−1 was obtained based on processing a 1 ml sample volume. A precision of better than 4% (RSD) at 1 ng ml−1 was typical. The methodology was successfully applied to the determination of Cu in several NRCC natural water and biological tissue Certified Reference Materials
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedYes
NPARC number16335083
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Record identifier4e8fc05b-d3d6-40e4-b4c7-69d3684dd5ee
Record created2010-11-15
Record modified2016-05-09
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