Document Detail

Methods for determining pesticides and polychlorinated biphenyls in food samples--problems and challenges.
MedLine Citation:
PMID:  18949592     Owner:  NLM     Status:  MEDLINE    
Determination of residual amounts of pesticides and polychlorinated biphenyls (PCBs) in food samples requires the use of specific techniques regarding sample preparation as well as instrumental analysis which should be characterized by a very low detection limit. A problem associated with the use of pesticides and PCBs is the need for controlling their residues in the environment, particularly in food, as these chemicals show a propensity to accumulate. The analysis of food samples for the presence of pesticides and PCBs brings on many difficulties because of the specificity of sample preparation consisting of multistep purification procedures of samples that contain trace amounts of an analyte. Concentration determinations of pollutants that easily dissolve in complex matrices, particularly in the presence of a large apportionment of interfering substances, pose a big challenge. Therefore, the basic step in food analysis for the presence of pesticides and PCBs is sample preparation which mainly consists of analyte enrichment and the removal of interfering substances. But all steps of the analytical procedure that include sample collection and preparation, extraction of analytes from matrix, extract purification, and final determination, are very significant; their precision and correct application have a decisive effect on the final result.
Angelika Beyer; Marek Biziuk
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Critical reviews in food science and nutrition     Volume:  48     ISSN:  1549-7852     ISO Abbreviation:  Crit Rev Food Sci Nutr     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-24     Completed Date:  2009-01-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8914818     Medline TA:  Crit Rev Food Sci Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  888-904     Citation Subset:  IM    
Department of Analytical Chemistry, Chemical Faculty, Gdansk University of Technology, Gdansk.
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MeSH Terms
Biosensing Techniques
Chromatography / methods
Food Analysis / methods*
Food Contamination / analysis*
Immunoassay / methods
Pesticide Residues / analysis*,  chemistry,  isolation & purification
Polychlorinated Biphenyls / analysis*,  chemistry,  isolation & purification
Reg. No./Substance:
0/Pesticide Residues; 0/Polychlorinated Biphenyls

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