Document Detail


Influences on transfer of selected synthetic pyrethroids from treated Formica to foods.
MedLine Citation:
PMID:  20029459     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Children's unstructured eating habits and activities may lead to excess dietary exposures not traditionally measured by the US Environmental Protection Agency. Influence of these activities on transfer of pesticides from treated Formica to foods was studied. The objective was to perform simulation experiments using four foods (bread, apple slices, bologna, and sugar cookies) exposed to treated Formica after varied time intervals between surface contamination and contact (1, 6, and 24 h) and frequency of contact with and without recontamination. Pesticides investigated included permethrin, bifenthrin, cyfluthrin, cypermethrin, and deltamethrin. Data will be used as input parameters for transfer efficiencies (TEs) within the Children's Dietary Intake Model (CDIM), which predicts total dietary exposure of a child. Pesticide transfer from surfaces to bologna and apples was more efficient than to bread and cookies. For the bread and cookies, all pyrethroids had a TE that ranged from below detectible levels to ≤ 4%. A combined average of 32-64% and 19-43% was transferred to bologna and apples, respectively, for the three contact times for all pyrethroids. The TEs of the varied time intervals indicated that increased time between contamination and contact showed little difference for bologna, bread, and cookies, but a significant difference for apples. As long as pesticide levels are measureable on surfaces in children's eating environment, it can be concluded that transfer of pesticides to foods will take place. Foods' characteristics had an important function in the transfer of pesticides when multiple contacts occurred. Regardless of recontamination, pesticides were efficiently transferred from the treated surface to bologna. The bologna did not reach a saturation point during the contacts. Pesticides were also efficiently transferred to apples, but reached a maximum TE during the second contact. The distribution of activity factors within CDIM needs to reflect the differences in the characteristics of the foods.
Authors:
Lisa Jo Melnyk; Thomas E Hieber; Tracy Turbeville; Anne P Vonderheide; Jeffrey N Morgan
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2009-12-23
Journal Detail:
Title:  Journal of exposure science & environmental epidemiology     Volume:  21     ISSN:  1559-064X     ISO Abbreviation:  J Expo Sci Environ Epidemiol     Publication Date:    2011 Mar-Apr
Date Detail:
Created Date:  2011-02-17     Completed Date:  2011-05-26     Revised Date:  2012-03-26    
Medline Journal Info:
Nlm Unique ID:  101262796     Medline TA:  J Expo Sci Environ Epidemiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  186-96     Citation Subset:  IM    
Affiliation:
US Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, Ohio 45268, USA. melnyk.lisa@epa.gov
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MeSH Terms
Descriptor/Qualifier:
Child
Environmental Exposure / analysis*
Floors and Floorcoverings*
Food Contamination / analysis*
Humans
Models, Biological
Pesticides / analysis*,  toxicity
Pyrethrins / analysis*,  toxicity
Risk Assessment / methods
Time Factors
Chemical
Reg. No./Substance:
0/Pesticides; 0/Pyrethrins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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