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The prepared nanocomposite was used to isolate and preconcentrate celecoxib from human breast milk, urine and plasma samples. In this method, dimethyldioctadecylanimonium bentonite increases the accessibility of binding sites and adsorption capacity by high microporosity and large surface area, that has been realized for the first time in a magnetic chitosan nanoparticle support. A fractional factorial design was utilized for screening the experimental parameters. The effective parameters were then optimized by Box\u2013Behnken design. Under the optimized conditions, the developed method exhibited wide linear ranges of 5\u2013500\u2009\u03bcg\u2009L<jats:sup>\u22121<\/jats:sup> for plasma and urine and 10\u2013500\u2009\u03bcg\u2009L<jats:sup>\u22121<\/jats:sup> for breast milk samples with satisfactory recoveries in the range of 96.7\u201399.0%. Limit of detection and quantification of celecoxib were in the ranges 0.3\u20133.2 and 0.99\u201310.56, respectively. The enrichment factors were obtained in the ranges 64.5\u201366.0, while precisions were &lt;3.7%.<\/jats:p>","DOI":"10.1002\/bmc.4877","type":"journal-article","created":{"date-parts":[[2020,5,9]],"date-time":"2020-05-09T09:39:12Z","timestamp":1589017152000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Dimethyldioctadecylanimonium bentonite immobilized magnetic chitosan nanoparticles as an efficient adsorbent for vortex\u2010assisted magnetic dispersive micro\u2010solid\u2010phase extraction of celecoxib from human breast milk, plasma and urine samples"],"prefix":"10.1002","volume":"34","author":[{"given":"Seyedeh Maedeh","family":"Majidi","sequence":"first","affiliation":[{"name":"Department of Analytical Chemistry, Faculty of Chemistry University of Mazandaran  Babolsar Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2503-1562","authenticated-orcid":false,"given":"Mohammad Reza","family":"Hadjmohammadi","sequence":"additional","affiliation":[{"name":"Department of Analytical Chemistry, Faculty of Chemistry University of Mazandaran  Babolsar Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,5,27]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4347(00)00574-0"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.talanta.2016.04.034"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2010.06.043"},{"issue":"3","key":"e_1_2_6_5_1","first-page":"225","article-title":"Molecularly imprinted polymers (MIP) for selective solid phase extraction of celecoxib in urine samples followed by high performance liquid chromatography","volume":"7","author":"Ansari S.","year":"2017","journal-title":"Journal of Chemical Health Risks"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2014.01.028"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2019.06.026"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-anchem-061010-114041"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1180\/claymin.2013.048.4.09"},{"key":"e_1_2_6_10_1","unstructured":"Chamkouri N. 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