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The method involves an in\u2010syringe magnetic stirring\u2010assisted dispersive liquid\u2013liquid microextraction along with simultaneous silylation prior to their determination by gas chromatography with mass spectrometry. Extraction, derivatization, and preconcentration have been simultaneously performed using acetone as dispersive solvent, <jats:italic>N<\/jats:italic>\u2010methyl\u2010<jats:italic>N<\/jats:italic>\u2010<jats:italic>tert<\/jats:italic>\u2010butyldimethylsilyltrifluoroacetamide as derivatization agent and trichloroethylene as extraction solvent. After stirring for 180 s, the sedimented phase was transferred to a rotary micro\u2010volume injection valve (3 \u03bcL) and introduced by an air stream into gas chromatograph with mass spectrometry detector. Recovery and enrichment factors were 87.2\u2013111.2% and 7.4\u201310.4, respectively. Relative standard deviations were in the ranges of 6.6\u20137.4 for intraday and 9.2\u20139.6 for interday precision. The detection limits were in the range of 0.045\u20130.03\u00a0\u03bcg\/L, and good linearity was observed up to 200\u00a0\u03bcg\/L, with <jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> ranging between 0.9905 and 0.9964. The developed method was satisfactorily applied to assess the occurrence of the studied herbicides in groundwater samples. The recovery test was also performed with values between 77 and 117%.<\/jats:p>","DOI":"10.1002\/jssc.201700875","type":"journal-article","created":{"date-parts":[[2017,12,11]],"date-time":"2017-12-11T06:53:02Z","timestamp":1512975182000},"page":"1096-1103","source":"Crossref","is-referenced-by-count":31,"title":["Determination of herbicides in environmental water samples by simultaneous in\u2010syringe magnetic stirring\u2010assisted dispersive liquid\u2013liquid microextraction and silylation followed by GC\u2013MS"],"prefix":"10.1002","volume":"41","author":[{"given":"Ruth","family":"Su\u00e1rez","sequence":"first","affiliation":[{"name":"Group of Analytical Chemistry Automation and Environment University of the Balearic Islands  Palma de Mallorca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sabrina","family":"Clavijo","sequence":"additional","affiliation":[{"name":"Sciware Systems S.L. spin\u2010off of the University of the Balearic Islands  Bunyola Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alba","family":"Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Sciware Systems S.L. spin\u2010off of the University of the Balearic Islands  Bunyola Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7474-9426","authenticated-orcid":false,"given":"V\u00edctor","family":"Cerd\u00e0","sequence":"additional","affiliation":[{"name":"Group of Analytical Chemistry Automation and Environment University of the Balearic Islands  Palma de Mallorca Spain"},{"name":"Sciware Systems S.L. spin\u2010off of the University of the Balearic Islands  Bunyola Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,1,2]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals,","year":"2013"},{"key":"e_1_2_7_3_1","unstructured":"Comission E. 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