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The <jats:styled-content style=\"fixed-case\">MFCNT<\/jats:styled-content>s were prepared through the capillarity of carbon nanotubes for drawing mixed cobalt and iron nitrates solution into their inner cavity followed by heating to 550\u00b0C under <jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>r to form the cobalt ferrite nanoparticles. <jats:styled-content style=\"fixed-case\">SEM<\/jats:styled-content> images provided visible evidence of the filled cobalt ferrite nanoparticles in the multiwalled nanotubes. <jats:styled-content style=\"fixed-case\">X<\/jats:styled-content>\u2010ray photoelectron spectroscopy indicated no adhesion of cobalt ferrite nanoparticles and metal salts on the outer surface of the <jats:styled-content style=\"fixed-case\">MFCNT<\/jats:styled-content>s. Eight <jats:styled-content style=\"fixed-case\">OCP<\/jats:styled-content>s were extracted with the <jats:styled-content style=\"fixed-case\">MFCNT<\/jats:styled-content>s. The enrichment factors were in the range of 52\u201368 for eight <jats:styled-content style=\"fixed-case\">OCP<\/jats:styled-content>s. The <jats:styled-content style=\"fixed-case\">LOD<\/jats:styled-content>s for the eight <jats:styled-content style=\"fixed-case\">OCP<\/jats:styled-content>s were in the range of 1.3\u20133.6 ng\/L. The recoveries of the <jats:styled-content style=\"fixed-case\">OCP<\/jats:styled-content>s for honey and tea samples were 83.2\u2013128.7 and 72.6\u2013111.0%, respectively. The <jats:styled-content style=\"fixed-case\">RSD<\/jats:styled-content>s for these samples were below 6.8%. The new method is particularly suited to extract nonpolar and weakly polar analytes from a complex matrix and could potentially be extended to other target analytes.<\/jats:p>","DOI":"10.1002\/jssc.201300710","type":"journal-article","created":{"date-parts":[[2013,8,8]],"date-time":"2013-08-08T03:11:01Z","timestamp":1375931461000},"page":"3387-3394","source":"Crossref","is-referenced-by-count":45,"title":["Novel magnetic <scp>SPE<\/scp> method based on carbon nanotubes filled with cobalt ferrite for the analysis of organochlorine pesticides in honey and tea"],"prefix":"10.1002","volume":"36","author":[{"given":"Zhuo","family":"Du","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Sun Yat\u2010sen University  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miao","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Sun Yat\u2010sen University  Guangzhou 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