Document Detail


Chlorine and chlorine dioxide treatment to reduce or remove EBDCs and ETU residues in a solution.
MedLine Citation:
PMID:  12137506     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Calcium hypochlorite (Ca(OCl)(2)) and chlorine dioxide (ClO(2)), common disinfecting and bleaching chemicals used in the food industry, are potent oxidizing agents. In this paper, the degradation effects of chlorine dioxide on mancozeb and ethylenethiourea (ETU) residues were investigated in a model system and compared with those of liquid chlorine, under various conditions such as differing concentration, pH, reaction time, and temperature. All samples were analyzed for residues by GLC and HPLC. Rate of mancozeb degradation was dependent on pH, with pH 4.6 being the most effective. Mancozeb residues decreased 40-100% with chlorine and chlorine dioxide treatments. ETU residue concentrations in mancozeb solutions were monitored over 60 min. Under controlled conditions, the ETU residue concentrations increased up to 15 min reaction time and then decreased in all three pH ranges. Treatment with both chlorine and chlorine dioxide at pH 4.6, yielded no ETU residues at both 10 and 21 degrees C. The results show that chlorine dioxide gives excellent degradation effects at lower concentrations than liquid chlorine.
Authors:
E Hwang; Jerry N Cash; Matthew J Zabik
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-07-24     Completed Date:  2002-09-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4734-42     Citation Subset:  IM    
Affiliation:
Department of Food Science and Human Nutrition, Institute for Environmental Toxicology, Michigan State University, East Lansing, Michigan 48824, USA.
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MeSH Terms
Descriptor/Qualifier:
Calcium Compounds / chemistry,  pharmacology
Chlorine / chemistry,  pharmacology*
Chlorine Compounds / chemistry,  pharmacology*
Chromatography, Gas
Chromatography, High Pressure Liquid
Ethylenethiourea / analysis*,  chemistry
Food Industry*
Fungicides, Industrial / analysis*,  chemistry
Hydrogen-Ion Concentration
Hydrolysis
Kinetics
Maneb / analysis*,  chemistry
Oxidation-Reduction
Oxides / chemistry,  pharmacology*
Pesticide Residues / analysis*,  chemistry
Solutions
Water
Zineb / analysis*,  chemistry
Chemical
Reg. No./Substance:
0/Calcium Compounds; 0/Chlorine Compounds; 0/Fungicides, Industrial; 0/Oxides; 0/Pesticide Residues; 0/Solutions; 10049-04-4/chlorine dioxide; 12122-67-7/Zineb; 12427-38-2/Maneb; 7732-18-5/Water; 7778-54-3/calcium hypochlorite; 7782-50-5/Chlorine; 8018-01-7/mancozeb; 96-45-7/Ethylenethiourea

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


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