{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T06:07:40Z","timestamp":1770962860383,"version":"3.50.1"},"reference-count":31,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2013,3,11]],"date-time":"2013-03-11T00:00:00Z","timestamp":1362960000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"National Key Project for Basic Research of China","award":["2012CB417004"],"award-info":[{"award-number":["2012CB417004"]}]},{"name":"National Scientific Foundation of China","award":["41171390"],"award-info":[{"award-number":["41171390"]}]},{"DOI":"10.13039\/501100002367","name":"Chinese Academy of Sciences","doi-asserted-by":"crossref","award":["YZ201105"],"award-info":[{"award-number":["YZ201105"]}],"id":[{"id":"10.13039\/501100002367","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Separation Science"],"published-print":{"date-parts":[[2013,4]]},"abstract":"<jats:p>A simple and economical method for the determination of eight polybrominated diphenyl ethers (<jats:styled-content style=\"fixed-case\">BDE<\/jats:styled-content>\u201028, 47, 99, 100,153,154,183, and 209) in water was developed. This method involves the use of ultrasound\u2010assisted dispersive liquid\u2013liquid microextraction combined with <jats:styled-content style=\"fixed-case\">GC<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">MS<\/jats:styled-content> in negative chemical ionization mode. Various parameters affecting the extraction efficiency, including the type and volume of extraction and dispersive solvents, salt concentration, extraction time, and ultrasonic time, were investigated. A volume of 1.0 mL of acetone (dispersive solvent) containing 10 \u03bcL tetrachloroethylene (extraction solvent) was injected into 5.0 mL of water samples and then emulsified by ultrasound for 2.0 min to produce the cloudy solution. Under the optimal condition, the enrichment factors for the eight <jats:styled-content style=\"fixed-case\">PBDE<\/jats:styled-content>s were varied from 845\u2010 to 1050\u2010folds. Good linearity was observed in the range of 1.0\u2013200 ng L<jats:sup>\u22121<\/jats:sup> for <jats:styled-content style=\"fixed-case\">BDE<\/jats:styled-content>\u201028, 47, 99, and 100; 5.0\u2013200 ng L<jats:sup>\u22121<\/jats:sup> for <jats:styled-content style=\"fixed-case\">BDE<\/jats:styled-content>\u2010153, 154, and 183; and 5.0\u2013500 ng L<jats:sup>\u22121<\/jats:sup> for <jats:styled-content style=\"fixed-case\">BDE<\/jats:styled-content>\u2010209. The <jats:styled-content style=\"fixed-case\">RSD<\/jats:styled-content> values were in the range of 2.5\u20138.4% (<jats:italic>n<\/jats:italic> = 5) and the <jats:styled-content style=\"fixed-case\">LODs<\/jats:styled-content> ranged from 0.40 to 2.15 ng L<jats:sup>\u22121<\/jats:sup> (<jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\/<jats:styled-content style=\"fixed-case\">N<\/jats:styled-content> = 3). The developed method was applied for the determination of eight <jats:styled-content style=\"fixed-case\">BPDE<\/jats:styled-content>s in the river and lake water samples, and the mean recoveries at spiking levels of 5.0 and 50.0 ng L<jats:sup>\u22121<\/jats:sup> were in the range of 70.6\u2013105.1%.<\/jats:p>","DOI":"10.1002\/jssc.201201049","type":"journal-article","created":{"date-parts":[[2013,1,18]],"date-time":"2013-01-18T04:22:41Z","timestamp":1358482961000},"page":"1263-1269","source":"Crossref","is-referenced-by-count":22,"title":["Ultrasound\u2010assisted dispersive liquid\u2013liquid microextraction combined with gas chromatography\u2010mass spectrometry in negative chemical ionization mode for the determination of polybrominated diphenyl ethers in water"],"prefix":"10.1002","volume":"36","author":[{"given":"Qian","family":"Zhang","sequence":"first","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences  Beijing P. 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