Minimization of transition metal interferences with hydride generation techniques

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DOIResolve DOI: http://doi.org/10.1021/ac9608026
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TypeArticle
Journal titleAnalytical Chemistry
ISSN00032700
Volume69
IssueFebruary 1 3
Pages527531; # of pages: 5
AbstractA new hydride generator has been characterized for use with the acid−NaBH4 hydride generation systems based on the insertion of a capillary tube into the sample introduction channel of a standard Meinhard nebulizer. The acidic sample and the tetrahydroborate solution are mixed at a merge point 1.5 cm from the end of the nebulizer orifice. Nebulization of the reaction solutions into a 0.7 mL tubular “spray chamber” follows a very short mixing time (less than 0.012 s) of the reagents. This approach permits 10 000 μg/mL Ni2+ or Cr3+ to be present in the sample solution without producing any interferences. Additionally, in the presence of Fe3+ added as a “releasing agent”, 5000 μg/mL Co2+ or 160 μg/mL Cu2+ can also be tolerated without interference. An 80 ± 2% generation efficiency is attained for the test element selenium. A detection limit of 6 μg/L (3σb) is achieved with ICP-AES detection. Precision of replicate measurements at the 12 μg/L level varies from 5 to 12% relative standard deviation.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedNo
Identifier10308271
NRC number848
NPARC number5763610
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Record identifier15a8a5cb-1315-44f6-bdb9-56b8ac3152f9
Record created2009-03-29
Record modified2016-05-09
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