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The influence of the main effects as well as their interactions was studied through a 2<jats:sup>(6\u20132)<\/jats:sup> fractional factorial design. The candidate parameters were: type and volume of dispersant and extraction solvents, sample pH, and salt concentration. Under final optimal conditions, the analytes were extracted from 5 mL of samples by addition of 0.5 mL of acetonitrile (dispersing solvent) containing 70 \u03bcL of carbon tetrachloride (extraction solvent), without modifying the pH of the solution and applying the (+1) level of salt concentration (10% w\/v NaCl). The assay was linear (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> &gt; 0.997), relative recoveries ranged from 86.9 up to 97.3% and the <jats:styled-content style=\"fixed-case\">LOQ<\/jats:styled-content>s between 3 and 45 ng mL<jats:sup>\u22121<\/jats:sup> were obtained. The intra\u2010 and interday <jats:styled-content style=\"fixed-case\">RSD<\/jats:styled-content>s were lower than 5 and 8% at the middle point of the linear range, respectively. The proposed method was successfully applied to different volunteer urine samples and it was shown that the extraction efficiency was not affected by the type of urine samples.<\/jats:p>","DOI":"10.1002\/jssc.201200564","type":"journal-article","created":{"date-parts":[[2012,12,10]],"date-time":"2012-12-10T05:20:01Z","timestamp":1355116801000},"page":"3575-3585","source":"Crossref","is-referenced-by-count":12,"title":["Chemometrics assisted dispersive liquid\u2013liquid microextraction for quantification of seven <scp>UV<\/scp> filters in urine samples by <scp>HPLC<\/scp>\u2010<scp>DAD<\/scp>"],"prefix":"10.1002","volume":"35","author":[{"given":"Maryam","family":"Vosough","sequence":"first","affiliation":[{"name":"Chemistry and Chemical Engineering Research Center of Iran Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nahal Rahimdoost","family":"Mojdehi","sequence":"additional","affiliation":[{"name":"Chemistry and Chemical Engineering Research Center of Iran Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amir","family":"Salemi","sequence":"additional","affiliation":[{"name":"Environmental Sciences Research Institute Shahid Beheshti University G. 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