Indirect Determination of Dichlorodiphenyltrichloroethane (DDT) After Dechlorination with Magnesium/Palladium Bimetallic Particles and Potentiometric Measurements

Determination of chlorine ions of pesticides was performed after dechlorination reaction using a palladium/magnesium system. Chlorine ions were quantified by potentiometry with ion-specific electrode. Rates of dechlorination of 100 μg of DDT as a function of reaction time and percent (wt/wt) of pall...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2010-05, Vol.84 (5), p.574-576
Main Authors: Estrela, Maria Amélia A., SouzaDe, Jurandir R., Dias, Sílvia C. L., Dórea, José G.
Format: Article
Language:English
Subjects:
Aquatic Pollution
Chlorine
DDT
DDT - analysis
DDT - chemistry
Dechlorination
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental Monitoring
Environmental Pollution - analysis
Environmental Restoration and Remediation - methods
Halogenation
Ions
Limit of Detection
Magnesium
Magnesium - chemistry
Palladium
Palladium - chemistry
Pesticides
Pesticides - chemistry
Pollution
Potentiometry
Soil Science & Conservation
Toxicology
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Determination of chlorine ions of pesticides was performed after dechlorination reaction using a palladium/magnesium system. Chlorine ions were quantified by potentiometry with ion-specific electrode. Rates of dechlorination of 100 μg of DDT as a function of reaction time and percent (wt/wt) of palladium deposited on the magnesium particles were determined. The best reaction conditions to DDT dechlorination were achieved with an acetone/water (1:1) solution and DDT reaction with a 0.27% (wt/wt) palladium/magnesium bimetallic system at room temperature for 10 min. The detection limit was of 0.24 μg/mL. This low cost method showed an efficiency of 92% in determining chlorine ions derived from DDT, it is fast, requiring no specialized laboratory equipment.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-010-9989-9