| Cross contamination of lead and cadmium during dry ashing of food samples. | |
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MedLine Citation:
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PMID: 12194040 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Common white sugar was ashed in a muffle furnace under controlled heating at 450 degrees C. Together with these samples, sugar with added amounts of Pb and Cd (20, 50 micro g) was mineralized in the same furnace. Depending on the absolute amount of Pb and Cd present in the furnace, an increase in the 'blank' values of the unspiked sugar samples was found. The same effect was observed when reference material containing natural amounts of Pb and Cd (TORT-1, Lobster) was present in the furnace. Although the results strongly depend on the blank levels of the muffle furnace, cross contamination effects could be demonstrated for both elements. The investigations demonstrate, that at a temperature of 450 degrees C, both Cd and Pb are lost during ashing of samples. The type of matrix in a sample with high contents of Pb and Cd has no significant effect on the volatility of these elements. The vapor lost from a sample containing high amounts of Pb and Cd will falsify the concentration in low level samples present in the furnace. |
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Authors:
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Peter Fecher; Gisela Ruhnke |
Publication Detail:
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Type: Journal Article Date: 2002-07-23 |
Journal Detail:
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Title: Analytical and bioanalytical chemistry Volume: 373 ISSN: 1618-2642 ISO Abbreviation: Anal Bioanal Chem Publication Date: 2002 Apr |
Date Detail:
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Created Date: 2002-08-23 Completed Date: 2002-10-01 Revised Date: 2003-01-03 |
Medline Journal Info:
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Nlm Unique ID: 101134327 Medline TA: Anal Bioanal Chem Country: Germany |
Other Details:
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Languages: eng Pagination: 787-91 Citation Subset: IM |
Affiliation:
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Landesamt für Gesundheit und Lebensmittelsicherheit, Henkestrasse 9-11, 91054 Erlangen, Germany. icpms@fecher.franken.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Calcium
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chemistry* Food Analysis* Food Contamination* Lead / analysis* |
| Chemical | |
Reg. No./Substance:
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7439-92-1/Lead; 7440-70-2/Calcium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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