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Studies of critical factors in the determination of arsenic in Standard Reference Materials of Marine origin by ETAAS:;NMKL(*) interlaboratory study.
MedLine Citation:
PMID:  15045393     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A study to determine factors which are known to influence the electrothermal atomic absorption (ETAAS) determination of As has been performed. The study has been carried out using five sample solutions of marine Standard Reference Materials distributed to four participating laboratories. Uncoated and pyrolytically coated graphite tubes with L'vov platform and Ni and Pd/Mg as chemical modifiers have been tested. No differences in results have been obtained between AAS instruments equipped with Zeeman correction or deuterium arc background correction. Small differences in concentration levels of arsenic as well as in characteristic mass were found when chemical modifiers were compared. Pd/Mg will be recommended in order to avoid a contamination of the graphite furnace with nickel. The characteristic mass was improved by using pyrolytically coated graphite tubes with the L'vov platform compared with uncoated graphite tubes with the L'vov platform. In the interlaboratory study, the standard addition procedure will be recommended.
Authors:
K Julshamn; A Maage; E H Larsen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical and bioanalytical chemistry     Volume:  355     ISSN:  1618-2650     ISO Abbreviation:  Anal Bioanal Chem     Publication Date:  1996 Jun 
Date Detail:
Created Date:  2004-03-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101134327     Medline TA:  Anal Bioanal Chem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  304-7     Citation Subset:  -    
Affiliation:
Institute of Nutrition, Directorate of Fisheries, PO Box 185, N-5002, Bergen, Norway.
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