PMID- 19378942 OWN - NLM STAT- MEDLINE DCOM- 20110524 LR - 20110214 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 57 IP - 10 DP - 2009 May 27 TI - Simultaneous extraction and cleanup method based on pressurized solvent extraction for multiresidue analysis of pesticides in complex feed samples. PG - 3963-73 LID - 10.1021/jf9004252 [doi] AB - The development of a multiresidue method based on pressurized solvent extraction (PSE) to determine a large number of pesticides (mostly pyrethroids and organochlorines) in cattle feed is described. As far as we know, this is the first work dedicated to the PSE of many of the target pesticides from animal feed. A mixed level fraction design was performed to investigate the influence of several operational variables on the PSE procedure; integrated cleanup strategies were also assessed allowing the direct chromatographic analysis of the extracts. Method accuracy was evaluated by the analysis of a certified reference material (BCR-115) and different fortified cattle feed samples. Most analytes were recovered in the range of 70-110%, with relative standard deviations generally lower than 15%. Limits of detection (LODs) were below the maximum residue levels (MRLs) set by the European Union for animal feed and main crops used in the preparation of feedingstuffs. The applicability of the proposed method was demonstrated by the analysis of real cattle feed samples collected from 23 dairy farms located in Galicia (NW Spain). FAU - Fernandez-Alvarez, Maria AU - Fernandez-Alvarez M AD - Departamento de Quimica Analitica, Nutricion y Bromatologia, Instituto de Investigacion y Analisis Alimentario, Campus Sur, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain. FAU - Llompart, Maria AU - Llompart M FAU - Lamas, J Pablo AU - Lamas JP FAU - Lores, Marta AU - Lores M FAU - Garcia-Jares, Carmen AU - Garcia-Jares C FAU - Garcia-Chao, Maria AU - Garcia-Chao M FAU - Dagnac, Thierry AU - Dagnac T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090420 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Acetamides) RN - 0 (Hydrocarbons, Chlorinated) RN - 0 (Organophosphorus Compounds) RN - 0 (Pesticide Residues) RN - 0 (Pyrethrins) RN - 0 (Solvents) SB - IM MH - Acetamides/analysis MH - Animal Feed/*analysis MH - Animals MH - Cattle MH - Chromatography, Gas MH - Food Analysis/*methods MH - Hydrocarbons, Chlorinated/analysis MH - Organophosphorus Compounds/analysis MH - Pesticide Residues/*analysis MH - Pressure MH - Pyrethrins/analysis MH - Solvents EDAT- 2009/04/22 09:00 MHDA- 2011/05/25 06:00 CRDT- 2009/04/22 09:00 PHST- 2009/04/22 09:00 [entrez] PHST- 2009/04/22 09:00 [pubmed] PHST- 2011/05/25 06:00 [medline] AID - 10.1021/jf9004252 [doi] PST - ppublish SO - J Agric Food Chem. 2009 May 27;57(10):3963-73. doi: 10.1021/jf9004252. Epub 2009 Apr 20.