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Determination of PAHs in wastewater irrigated agricultural soil using accelerated solvent extraction

Determination of PAHs in wastewater irrigated agricultural soil using accelerated solvent extraction

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes 37(2): 141-150

A procedure was developed for determination of 16 polycyclic aromatic hydrocarbons (PAHs) in heavily contaminated paddy soil from wastewater irrigated farmland near Tianjin. The sample was distilled with accelerated solvent extraction (ASE), purified by a silica gel column, and measured with GC/MS. The optimal conditions for the distillation were at 140 degrees C (1500 psi) with a 1:1 mixture of dichloromethane and acetone for 5 min. Application of cyclohexane for extract transfer improved the recovery when the ASE extraction was followed by a silica gel cleanup procedure. Recoveries from the method for 16 PAHs ranged from 57-140% with the coefficients of variation of the results ranging from 0.35% to 5.75%. The total 16 PAHs in a composite sample collected from a wastewater irrigated paddy field near Tianjin was 3.90 mg/kg.

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Accession: 010439518

Download citation: RISBibTeXText

PMID: 11990368

DOI: 10.1081/pfc-120002986

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