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Opt."],"published-print":{"date-parts":[[2020,4,1]]},"abstract":"A magnetic material, \n \n\t\n\t \n\t F<\/mml:mi>\n\t e<\/mml:mi>\n\t <\/mml:mrow>\n\t 3<\/mml:mn>\n\t<\/mml:msub>\n\t\n\t \n\t \n\t O<\/mml:mi>\n\t <\/mml:mrow>\n\t 4<\/mml:mn>\n\t <\/mml:msub>\n\t<\/mml:mrow>\n\t\n\t @<\/mml:mo>\n\t<\/mml:mrow>\n\t\n\t \n\t \n\t Z<\/mml:mi>\n\t r<\/mml:mi>\n\t O<\/mml:mi>\n\t <\/mml:mrow>\n\t \n\t 2<\/mml:mn>\n\t <\/mml:mrow>\n\t <\/mml:msub>\n\t<\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>, was used to enrich an organophosphorus pesticide, fenthion. After enrichment the \n \n\t\n\t \n\t F<\/mml:mi>\n\t e<\/mml:mi>\n\t <\/mml:mrow>\n\t 3<\/mml:mn>\n\t<\/mml:msub>\n\t\n\t \n\t \n\t O<\/mml:mi>\n\t <\/mml:mrow>\n\t 4<\/mml:mn>\n\t <\/mml:msub>\n\t<\/mml:mrow>\n\t\n\t @<\/mml:mo>\n\t<\/mml:mrow>\n\t\n\t \n\t \n\t Z<\/mml:mi>\n\t r<\/mml:mi>\n\t O<\/mml:mi>\n\t <\/mml:mrow>\n\t \n\t 2<\/mml:mn>\n\t <\/mml:mrow>\n\t <\/mml:msub>\n\t<\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula> was treated with NaOH to elute and hydrolyze fenthion. The hydrolysis products, orthophosphate ions, combine to molybdate ions to yield molybdophosphoric acid, which was further reduced with \n \n\t\n\t \n\t S<\/mml:mi>\n\t n<\/mml:mi>\n\t C<\/mml:mi>\n\t l<\/mml:mi>\n\t <\/mml:mrow>\n\t 2<\/mml:mn>\n\t<\/mml:msub>\n <\/mml:math>\n <\/jats:inline-formula> to obtain a blue phosphatemolybdate. The content of orthophosphate ions as well as fenthion can be determined through the spectrophotometric method. Adsorption and elution conditions were optimized to obtain an enrichment factor of 12.5. The proposed composite method was successfully used to analyze the fenthion residues on the skin of cucumber and apple samples. The limit of detection was as low as 0.037\u00a0mg\/Kg, which was close to that of the gas chromatography\u2013mass spectrometer method. The method was simple, rapid, and economic, suitable for the rapid screen of fenthion and the other organophosphorus pesticide in mass samples.<\/jats:p>","DOI":"10.1364\/ao.386337","type":"journal-article","created":{"date-parts":[[2020,2,21]],"date-time":"2020-02-21T15:30:38Z","timestamp":1582299038000},"page":"3043","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Spectrophotometric detection of fenthion in foods after extraction by magnetic zirconia"],"prefix":"10.1364","volume":"59","author":[{"given":"Zhengzhong","family":"Lin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shishun","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhiyong","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhuzhi","family":"Lai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yingying","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2020,3,25]]},"reference":[{"key":"ao-59-10-3043-R1","doi-asserted-by":"publisher","first-page":"365","DOI":"10.1016\/j.jhazmat.2018.04.036","volume":"359","author":"Zou","year":"2018","journal-title":"J. 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