Studies on the extraction of sulfonamides from agricultural soils.

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Raich-Montiu J, Beltran JL, Prat MD, Granados M

Studies on the extraction of sulfonamides from agricultural soils.

Anal Bioanal Chem. 2010 May;397(2):807-14. doi: 10.1007/s00216-010-3580-4. Epub 2010 Mar 10.

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20217396 [ View in PubMed
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Abstract

The extraction of six sulfonamides (sulfadiazine, sulfadimidine, sulfathiazole, sulfachloropiridazine, sulfadimethoxine, and sulfaquinoxaline) from soils with different physicochemical characteristics and at several aging times was investigated. Conventional mechanical shaking, microwave-assisted extraction, ultrasound probe-assisted extraction and pressurized liquid extraction techniques were evaluated. The four techniques provided similar results when applied to freshly contaminated soils. However, microwave-assisted extraction was the most suitable to extract sulfonamide aged residues from soils. Microwave-assisted extraction was applied to eight soils aged for 3 months, using acetonitrile:buffer pH 9 (20:80) as the extraction solvent, and recoveries ranged from 15-25% for STZ to 42-64% for SDM.

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