TY - JOUR
T1 - Extraction solvent selection in environmental analysis
AU - Fitzpatrick, Lisa
AU - Dean, John
N1 - 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.
PY - 2002/11
Y1 - 2002/11
N2 - 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.
AB - 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.
KW - Pesticides
KW - Organic solvents
U2 - 10.1021/ac001336u
DO - 10.1021/ac001336u
M3 - Article
SN - 0003-2700
VL - 74
SP - 74
EP - 79
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 1
ER -