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Some parameters of the proposed method, such as volume and type of disperser and extraction solvent, and <jats:styled-content style=\"fixed-case\">N<\/jats:styled-content>a[<jats:styled-content style=\"fixed-case\">B<\/jats:styled-content>(<jats:styled-content style=\"fixed-case\">C<\/jats:styled-content><jats:sub>6<\/jats:sub><jats:styled-content style=\"fixed-case\">H<\/jats:styled-content><jats:sub>5<\/jats:sub>)<jats:sub>4<\/jats:sub>] concentration were investigated using response surface methodology. Suitable recoveries were obtained using 80\u00a0\u03bcL <jats:styled-content style=\"fixed-case\">C<\/jats:styled-content><jats:sub>2<\/jats:sub><jats:styled-content style=\"fixed-case\">C<\/jats:styled-content>l<jats:sub>4<\/jats:sub> (as extraction solvent), 1000\u00a0\u03bcL ethanol (as disperser solvent), and 300\u00a0\u03bcL 2.1 mmol\/L <jats:styled-content style=\"fixed-case\">N<\/jats:styled-content>a[<jats:styled-content style=\"fixed-case\">B<\/jats:styled-content>(<jats:styled-content style=\"fixed-case\">C<\/jats:styled-content><jats:sub>6<\/jats:sub><jats:styled-content style=\"fixed-case\">H<\/jats:styled-content><jats:sub>5<\/jats:sub>)<jats:sub>4<\/jats:sub>] (as derivatizing agent). Accuracy was evaluated in terms of recovery and ranged from 87 to 99% with <jats:styled-content style=\"fixed-case\">RSD<\/jats:styled-content> values &lt;7%. In addition, a certified reference material of water (<jats:styled-content style=\"fixed-case\">NIST<\/jats:styled-content> 1641d) was analyzed and agreed with the certified value about 107% (for <jats:styled-content style=\"fixed-case\">H<\/jats:styled-content>g<jats:sup>2+<\/jats:sup>), with <jats:styled-content style=\"fixed-case\">RSD<\/jats:styled-content> values &lt;8.5%. <jats:styled-content style=\"fixed-case\">LOD<\/jats:styled-content>s were 0.3 and 0.2\u00a0\u03bcg\/L, with enrichment factors of 112 and 115 for <jats:styled-content style=\"fixed-case\">H<\/jats:styled-content>g<jats:sup>2+<\/jats:sup> and <jats:styled-content style=\"fixed-case\">CH<\/jats:styled-content><jats:sub>3<\/jats:sub><jats:styled-content style=\"fixed-case\">H<\/jats:styled-content>g<jats:sup>+<\/jats:sup>, respectively. The optimized method was applied for the determination of <jats:styled-content style=\"fixed-case\">H<\/jats:styled-content>g<jats:sup>2+<\/jats:sup> and <jats:styled-content style=\"fixed-case\">CH<\/jats:styled-content><jats:sub>3<\/jats:sub><jats:styled-content style=\"fixed-case\">H<\/jats:styled-content>g<jats:sup>+<\/jats:sup> in tap, well, and lake water samples.<\/jats:p>","DOI":"10.1002\/jssc.201300599","type":"journal-article","created":{"date-parts":[[2013,8,15]],"date-time":"2013-08-15T11:29:11Z","timestamp":1376566151000},"page":"3411-3418","source":"Crossref","is-referenced-by-count":18,"title":["Assessment of dispersive liquid\u2013liquid microextraction for the simultaneous extraction, preconcentration, and derivatization of <scp>H<\/scp>g<sup>2+<\/sup> and <scp>CH<\/scp><sub>3<\/sub><scp>H<\/scp>g<sup>+<\/sup> for further determination by <scp>GC<\/scp>\u2013<scp>MS<\/scp>"],"prefix":"10.1002","volume":"36","author":[{"given":"Bruno M.","family":"Soares","sequence":"first","affiliation":[{"name":"Escola de Qu\u00edmica e Alimentos Universidade Federal do Rio Grande  Rio Grande RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ederson R.","family":"Pereira","sequence":"additional","affiliation":[{"name":"Escola de Qu\u00edmica e Alimentos Universidade Federal do Rio Grande  Rio Grande RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juliana V.","family":"Maciel","sequence":"additional","affiliation":[{"name":"Escola de Qu\u00edmica e Alimentos Universidade Federal do Rio Grande  Rio Grande RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Augusto A.","family":"Vieira","sequence":"additional","affiliation":[{"name":"Escola de Qu\u00edmica e Alimentos Universidade Federal do Rio Grande  Rio Grande RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabio A.","family":"Duarte","sequence":"additional","affiliation":[{"name":"Escola de Qu\u00edmica e Alimentos Universidade Federal do Rio Grande  Rio Grande RS Brazil"},{"name":"Departamento de Qu\u00edmica Universidade Federal de Santa Maria  Santa Maria RS Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,9]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/0470856009"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1289\/ehp.7743"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00216-008-1966-3"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.fct.2009.04.024"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.microc.2012.02.001"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2008.05.048"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.talanta.2011.10.026"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijms.2011.01.026"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sab.2010.12.003"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.talanta.2009.06.053"},{"key":"e_1_2_7_12_1","first-page":"228","volume":"05","author":"Pilz C.","year":"2011","journal-title":"Br. 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