Document Detail


Perchlorate in the feed-dairy continuum of the southwestern United States.
MedLine Citation:
PMID:  18553887     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Perchlorate has the potential to cause thyroid dysfunction by inhibiting iodide uptake by the sodium iodide symporter. Perchlorate-contaminated waters may lead to human exposure through drinking water and food chain transfer in crops by way of irrigation water. Perchlorate has been found in dairy milk collected nationally and internationally. This study was conducted to evaluate perchlorate in the feed-dairy continuum in the southwestern United States. All feed products collected at dairies in this study had detectable levels of perchlorate as analyzed by ion chromatography-tandem mass spectrometry. The calculated total perchlorate intake across dairies ranged from 1.9 to 12.7 mg/cow per day. The variation in total perchlorate intake across dairies was largely associated with variation in forage and silage products. Alfalfa products were the single most important source of perchlorate intake variability among dairies. The estimated perchlorate intake from drinking water ranged from 0.01 mg per cow per day and was generally less than 2% of the total perchlorate intake. The perchlorate content of milk ranged from 0.9 to 10.3 microg/L and was similar to levels reported by the Food and Drug Administration's Total Diet Study. The perchlorate content of milk was significantly related to the presence of perchlorate in feed but the variation of perchlorate in milk could not be explained by feed intake alone.
Authors:
C A Sanchez; B C Blount; L Valentin-Blasini; S M Lesch; R I Krieger
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-06-13
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  56     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-07-03     Completed Date:  2008-09-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5443-50     Citation Subset:  IM    
Affiliation:
Department of Soil, Water, and Environmental Sciences, Yuma Agricultural Center, The University of Arizona, Yuma, Arizona 85364, USA.
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MeSH Terms
Descriptor/Qualifier:
Animal Feed / analysis*
Animals
Cattle
Female
Iodine / analysis
Medicago sativa / chemistry
Milk / chemistry*
Nitrates / analysis
Perchloric Acid / analysis*
Southwestern United States
Thiocyanates / analysis
Water / chemistry
Water Pollutants, Chemical / chemistry
Chemical
Reg. No./Substance:
0/Nitrates; 0/Thiocyanates; 0/Water Pollutants, Chemical; 0/perchlorate; 302-04-5/thiocyanate; 7553-56-2/Iodine; 7601-90-3/Perchloric Acid; 7732-18-5/Water

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


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