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Different parameters were optimized and good recoveries (65\u2013108% range) and precisions (12\u201319% range) were achieved with spiked water samples for a concentration of 0.1 \u03bcg\/L. The experimental results showed an excellent linearity (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup> &gt; 0.99) over the 0.1\u20131.5 \u03bcg\/L range. The detection limits of the proposed method were 1\u201337 ng\/L for most of the compounds studied. The methodology has been successfully applied to the analysis of groundwater samples from vineyard areas in <jats:styled-content style=\"fixed-case\">L<\/jats:styled-content>a <jats:styled-content style=\"fixed-case\">R<\/jats:styled-content>ioja and the presence of pesticides, especially fungicides and herbicides, at several concentration levels was revealed. Terbuthylazine, its metabolite desethyl\u2010terbuthylazine, and fluometuron were the pesticides most frequently detected in higher concentrations. Overall and taking into consideration the <jats:styled-content style=\"fixed-case\">E<\/jats:styled-content>uropean <jats:styled-content style=\"fixed-case\">U<\/jats:styled-content>nion maximum residue limit of pesticides in groundwater, 16 of the 34 compounds included in this study were detected in concentrations over that limit in at least one of the samples analyzed.<\/jats:p>","DOI":"10.1002\/jssc.201200380","type":"journal-article","created":{"date-parts":[[2012,12,10]],"date-time":"2012-12-10T05:20:01Z","timestamp":1355116801000},"page":"3492-3500","source":"Crossref","is-referenced-by-count":15,"title":["Pesticides and degradation products in groundwaters from a vineyard region: Optimization of a multiresidue method based on <scp>SPE<\/scp> and <scp>GC<\/scp>\u2010<scp>MS<\/scp>"],"prefix":"10.1002","volume":"35","author":[{"given":"Eliseo","family":"Herrero\u2010Hern\u00e1ndez","sequence":"first","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiolog\u00eda de Salamanca (IRNASA\u2010CSIC) Salamanca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eva","family":"Pose\u2010Juan","sequence":"additional","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiolog\u00eda de Salamanca (IRNASA\u2010CSIC) Salamanca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alba","family":"\u00c1lvarez\u2010Mart\u00edn","sequence":"additional","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiolog\u00eda de Salamanca (IRNASA\u2010CSIC) Salamanca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda Soledad","family":"Andrades","sequence":"additional","affiliation":[{"name":"Departamento de Agricultura y Alimentaci\u00f3n Universidad de La Rioja Logro\u00f1o Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda Sonia","family":"Rodr\u00edguez\u2010Cruz","sequence":"additional","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiolog\u00eda de Salamanca (IRNASA\u2010CSIC) Salamanca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda J.","family":"S\u00e1nchez\u2010Mart\u00edn","sequence":"additional","affiliation":[{"name":"Instituto de Recursos Naturales y Agrobiolog\u00eda de Salamanca (IRNASA\u2010CSIC) Salamanca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2012,12,7]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2009.08.013"},{"key":"e_1_2_7_3_1","first-page":"1","article-title":"Decision 2455\/2001\/EC","volume":"331","author":"Council of the European Communities","year":"2001","journal-title":"Off. 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