PMID- 20334160 OWN - NLM STAT- MEDLINE DCOM- 20100503 LR - 20191210 IS - 1060-3271 (Print) IS - 1060-3271 (Linking) VI - 93 IP - 1 DP - 2010 Jan-Feb TI - Evaluation of immunoassays as an alternative for the rapid determination of pesticides in wine and grape samples. PG - 2-11 AB - The main objective of this paper is to address the performance of immunochemical assays for the detection of the residues of three pesticides [atrazine, bromopropylate, and 2,4,6-trichlorophenol (TCP)] in real winery samples, such as wine, grapes, and grape juice. Different approaches have been evaluated to minimize interferences from the matrixes, and suitable working protocols have been established in order to achieve the necessary LODs, accuracy, and precision for real samples. A simple dilution of the sample proved to be sufficient for the determination of atrazine and bromopropylate in red and white wine and grape juice at the required levels of concentration. However, for TCP, an SPE procedure has been optimized using amino cartridges. The recoveries were above 85% in all cases, and the LOD values were below the parts per billion level, except for bromopropylate, which ranged between 2 and 50 microg/L, depending on the matrix. The grape matrix effect could be resolved by a simple extraction with methanol. Complete recoveries were obtained, and the final measurement procedures were able to determine selected pesticides below their maximum residue levels. The newly developed methods have been compared with standard chromatographic methods. FAU - Argarate, Nerea AU - Argarate N AD - AZTI-Tecnalia, Food Research Division, 48160 Derio, Bizkaia, Spain. FAU - Arestin, Maria AU - Arestin M FAU - Ramon-Azcon, Javier AU - Ramon-Azcon J FAU - Alfaro, Begona AU - Alfaro B FAU - Barranco, Alejandro AU - Barranco A FAU - Sanchez-Baeza, Francisco AU - Sanchez-Baeza F FAU - Marco, M Pilar AU - Marco MP LA - eng PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J AOAC Int JT - Journal of AOAC International JID - 9215446 RN - 0 (Benzilates) RN - 0 (Chlorophenols) RN - 0 (Pesticides) RN - 3U468ZM257 (isopropyl 4,4'-dibromobenzilate) RN - MHS8C5BAUZ (2,4,6-trichlorophenol) RN - QJA9M5H4IM (Atrazine) SB - IM MH - Atrazine/analysis/toxicity MH - Benzilates/analysis/toxicity MH - Chlorophenols/analysis/toxicity MH - Chromatography, High Pressure Liquid MH - Enzyme-Linked Immunosorbent Assay MH - Food Contamination/analysis MH - Gas Chromatography-Mass Spectrometry MH - Humans MH - Immunoassay/*methods MH - Immunochemistry/methods MH - Pesticides/*analysis/toxicity MH - Vitis/*chemistry/toxicity MH - Wine/*analysis/toxicity EDAT- 2010/03/26 06:00 MHDA- 2010/05/04 06:00 CRDT- 2010/03/26 06:00 PHST- 2010/03/26 06:00 [entrez] PHST- 2010/03/26 06:00 [pubmed] PHST- 2010/05/04 06:00 [medline] PST - ppublish SO - J AOAC Int. 2010 Jan-Feb;93(1):2-11.