Extraction solvent selection in environmental analysis

Fitzpatrick, Lisa and Dean, John (2002) Extraction solvent selection in environmental analysis. Analytical Chemistry, 74 (1). pp. 74-79. ISSN 0003-2700

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Abstract

A method for the prediction of a suitable solvent for the extraction of pesticides is outlined. The procedure is based on the Hildebrand solubility parameter, ?t. The solubility parameter is broken down into three individual components, which are calculated by the addition of group contributions. To demonstrate the applicability of the approach pressurized fluid extraction was used to extract 4,4‘-DDT [1,1,1-trichloro- 2,2-bis(p-chlorophenyl)ethane] and its metabolites, 4,4‘-DDD [1,1- dichloro-2,2-bis(p-chlorophenyl)ethane] and 4,4‘-DDE [1,1-dichloro-2,2- bis(p-chlorophenyl)ethylene], from an historically contaminated soil from the United States and pentachlorophenol from a certified reference material (CRM524) using various solvents. Visual representation of the individual parameters predicted the ideal extraction solvent to be DCM for 4,4‘-DDT and its metabolites and a mixture of acetonitrile and dichloromethane (1:1, v/v) for PCP. These findings were confirmed by the experimental results.

Item Type:	Article
Additional Information:	An industrially sponsored (Avecia, Zeneca Agrochemicals and AstraZeneca) collaboration to develop and evaluate a model for estimating pesticide extraction from soil using organic solvents; subsequent outputs used approach to select optimim extraction conditions. L.J. Fitzpatrick was a PhD student at Northumbria University.
Uncontrolled Keywords:	Pesticides, Organic solvents
Subjects:	F100 Chemistry
Department:	Faculties > Health and Life Sciences > Applied Sciences
Depositing User:	EPrint Services
Date Deposited:	27 May 2008 16:29
Last Modified:	12 Oct 2019 17:29
URI:	http://nrl.northumbria.ac.uk/id/eprint/1783

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