{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:49:19Z","timestamp":1786978159323,"version":"build-2736575974"},"reference-count":45,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2018,2,26]],"date-time":"2018-02-26T00:00:00Z","timestamp":1519603200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Islamic Azad University South Tehran Branch"}],"content-domain":{"domain":["scijournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Sci Food Agric"],"published-print":{"date-parts":[[2018,7]]},"abstract":"Abstract<\/jats:title>\n \n BACKGROUND<\/jats:title>\n Magnetic graphene oxide nanocomposite has been proposed as a promising and sustainable sorbent for the extraction and separation of target analytes from food matrices. Sample preparation based on nanocomposite presents several advantages, such as desired efficiency, reasonable selectivity and high surface\u2010area\u2010to\u2010volume ratio.<\/jats:p>\n <\/jats:sec>\n \n RESULTS<\/jats:title>\n \n A new graphene oxide\/Fe\n 3<\/jats:sub>\n O\n 4<\/jats:sub>\n @polythionine (GO\/Fe\n 3<\/jats:sub>\n O\n 4<\/jats:sub>\n @PTh) nanocomposite sorbent was introduced for magnetic dispersive solid\u2010phase extraction and flame atomic absorption spectrometric detection of zinc(II) in water, flour, celery and egg. To fabricate the sorbent, an oxidative polymerization of thionine on the surface of magnetic GO was applied, while polythionine was simply employed as a surface modifier to improve extraction yield. The properties of the sorbent were characterized by transmission electron microscopy, scanning electron microscopy, X\u2010ray diffraction, energy\u2010dispersive X\u2010ray analysis, vibrating sample magnetometry and Fourier transform\u2013infrared spectroscopy. The calibration curve showed linearity in the range of 0.5\u201330\u2009ng mL\n \u22121<\/jats:sup>\n . Limits of detection (\n S<\/jats:italic>\n \/\n N<\/jats:italic>\n \u2009=\u20093) and quantification (\n S<\/jats:italic>\n \/\n N<\/jats:italic>\n \u2009=\u200910) were 0.08 and 0.5\u2009ng mL\n \u22121<\/jats:sup>\n , respectively.\n <\/jats:p>\n <\/jats:sec>\n \n CONCLUSION<\/jats:title>\n The method was applied for trace\u2010level determination of Zn(II) in water and food samples, and its validation was investigated by recovery experiments and analyzing certified reference material. \u00a9 2018 Society of Chemical Industry<\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/jsfa.8873","type":"journal-article","created":{"date-parts":[[2018,1,10]],"date-time":"2018-01-10T07:34:20Z","timestamp":1515569660000},"page":"3571-3579","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Magnetic dispersive solid\u2010phase extraction based on graphene oxide\/Fe\n 3<\/sub>\n O\n 4<\/sub>\n @polythionine nanocomposite followed by atomic absorption spectrometry for zinc monitoring in water, flour, celery and egg"],"prefix":"10.1002","volume":"98","author":[{"given":"Azar","family":"Babaei","sequence":"first","affiliation":[{"name":"Department of Chemistry, Faculty of Science Islamic Azad University Karaj Branch, Karaj Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6116-7395","authenticated-orcid":false,"given":"Mohsen","family":"Zeeb","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry, Faculty of Science Islamic Azad University South Tehran Branch, Tehran Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali","family":"Es\u2010haghi","sequence":"additional","affiliation":[{"name":"Department of Physico Chemistry Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO) Karaj 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