{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T00:44:12Z","timestamp":1760921052503,"version":"build-2065373602"},"reference-count":41,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2004,9,16]],"date-time":"2004-09-16T00:00:00Z","timestamp":1095292800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Separation Science"],"published-print":{"date-parts":[[2004,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The coupled\u2010column (LC\u2010LC) system, consisting of a first column packed with internal surface reversed phase (ISRP) (50\u00d74.6 mm ID) and a Chrompack C<jats:sub>18<\/jats:sub> (100\u00d74.6 mm ID) as second column, allowed the simultaneous determination of five benzoylurea insecticides in dichloromethane (CH<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>) extracts of vegetable samples without any clean\u2010up step. This system was combined with a photochemically induced fluorescence (PIF) post\u2010column derivatization in order to provide strongly fluorescent photoproducts from the non\u2010fluorescent benzoylureas. Limits of detection ranged from 0.21 to 0.98 \u03bcg L<jats:sup>\u20131<\/jats:sup> of pesticide (equivalent to 0.14\u20130.65 \u03bcg kg<jats:sup>\u20131<\/jats:sup> in vegetable samples) and limits of determination ranged from 4.0 to 10.0 \u03bcg L<jats:sup>\u20131<\/jats:sup> (equivalent to 2.7\u20136.7 \u03bcg kg<jats:sup>\u20131<\/jats:sup>). Linearity of the method was established between 2 and 1800 \u03bcg L<jats:sup>\u20131<\/jats:sup>, depending upon the compound. Validation of the total method was performed by randomly analyzing recoveries of four vegetable samples (aubergine, cucumber, green bean, and tomato) spiked at two levels of concentration (10.0 and 33.3 \u03bcg kg<jats:sup>\u20131<\/jats:sup>). The combination of the LC\u2010LC system with PIF detection provides a sensitive, selective, and rapid method for the determination of pesticides in vegetable samples at levels lower than the maximum residue levels (MRLs) established for these compounds by Spanish legislation.<\/jats:p>","DOI":"10.1002\/jssc.200301661","type":"journal-article","created":{"date-parts":[[2004,9,16]],"date-time":"2004-09-16T06:00:35Z","timestamp":1095314435000},"page":"1173-1180","source":"Crossref","is-referenced-by-count":14,"title":["Coupled\u2010column liquid chromatography method with photochemically induced derivatization for the direct determination of benzoylureas in vegetables"],"prefix":"10.1002","volume":"27","author":[{"given":"Mar\u00eda Dolores","family":"Gil Garc\u00eda","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dolores","family":"Barranco Mart\u00ednez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda","family":"Mart\u00ednez Galera","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Piedad","family":"Parrilla V\u00e1zquez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,10,6]]},"reference":[{"key":"e_1_2_1_2_2","unstructured":"D.Barcel\u00f3 Sample Handling and Trace Analysis Pollutants Techniques Applications and Quality Assurance Elsevier Science 2000 Chap. 8."},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(98)00916-9"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/0021-9673(91)85058-N"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/0048-9697(93)90143-T"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/0003-2670(95)00160-2"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac971030w"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1081\/JLC-120015890"},{"key":"e_1_2_1_9_2","first-page":"933","volume":"56","author":"Hogendoorn E.A.","year":"1991","journal-title":"P. 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