Document Detail

Heavy metal determination in aquatic species for food purposes.
MedLine Citation:
PMID:  11329770     Owner:  NLM     Status:  MEDLINE    
New analytical procedures and sample mineralizations are proposed regarding the determination of arsenic, selenium, copper, lead, cadmium, zinc and mercury in matrices involved in food chain as mussel, clams and fishes. As regard As, Se, Cu, Pb, Cd and Zn determinations, H2SO4-HNO3 acidic mixture is used for the digestion of each matrix. In the case of Hg the sample digestion is performed using a concentrated suprapure H2SO4-K2Cr2O7 mixture and the results are compared with those from other conventional methods. Differential pulse cathodic (DPCSV) and anodic stripping voltammetry (DPASV) are employed for determining simultaneously selenium, arsenic and copper, lead, cadmium, zinc, respectively, while mercury determination is carried out by the cold vapour atomic absorption spectrometry (CV-AAS) with reduction with SnCl2. The voltammetric measurements were performed using a conventional three-electrode cell and the ammonia-ammonium chloride buffer (pH 9.3) as supporting electrolyte. For all the elements, in addition to the detection limits, precision and accuracy data are also reported: the former, expressed as relative standard deviation (Sr), and the latter, expressed as relative error (e), are in all cases between 3 to 6%.
C Locatelli; G Torsi
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annali di chimica     Volume:  91     ISSN:  0003-4592     ISO Abbreviation:  Ann Chim     Publication Date:    2001 Jan-Feb
Date Detail:
Created Date:  2001-05-01     Completed Date:  2001-05-21     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  7610375     Medline TA:  Ann Chim     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  65-72     Citation Subset:  IM    
Department of Chemistry G. Ciamician, University of Bologna, Via F. Selmi 2, I-40126-Bologna, Italy.
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MeSH Terms
Arsenic / analysis
Bivalvia / chemistry
Food Chain
Foodborne Diseases / prevention & control
Metals, Heavy / analysis*
Mollusca / chemistry*
Ostreidae / chemistry
Selenium / analysis
Shellfish / toxicity
Spectrophotometry, Atomic
Reg. No./Substance:
0/Metals, Heavy; 7440-38-2/Arsenic; 7782-49-2/Selenium

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