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The alkylation reaction is done in the aqueous and urine medium and the less\u2010polar derivatives are extracted in hexane by liquid\u2013liquid extraction. The species were extracted and the extract was efficiently collected from the aqueous phase after centrifugation. Finally, the organometallic species are separated by gas chromatography and determined from the emission signals of elemental lead and tin. Atomic lead and tin are formed from the organolead and organotin compounds during atomization of the column eluate in a microwave\u2010induced helium plasma source. The simultaneous measurement of lead (Pb) at 405.780 nm and tin (<jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>n) at 303.419 nm was achieved by an atomic emission detector. Finally, the analytes were determined with satisfactory precision (&lt;5%) and detection limits of 0.05 \u03bcg <jats:styled-content style=\"fixed-case\">P<\/jats:styled-content>b\/<jats:styled-content style=\"fixed-case\">L<\/jats:styled-content> and 0.48 \u03bcg <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>n\/<jats:styled-content style=\"fixed-case\">L<\/jats:styled-content>, respectively, when 10 m<jats:styled-content style=\"fixed-case\">L<\/jats:styled-content> of urine is extracted with 1 m<jats:styled-content style=\"fixed-case\">L<\/jats:styled-content> of hexane and 1 \u03bc<jats:styled-content style=\"fixed-case\">L<\/jats:styled-content> of extract is injected.<\/jats:p>","DOI":"10.1002\/jssc.201101041","type":"journal-article","created":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T01:56:43Z","timestamp":1339466203000},"page":"1132-1137","source":"Crossref","is-referenced-by-count":25,"title":["Speciation analysis of triethyl\u2010lead and tributyl\u2010tin compounds in human urine by liquid\u2013liquid extraction and gas chromatography microwave\u2010induced plasma atomic emission detection"],"prefix":"10.1002","volume":"35","author":[{"given":"George A.","family":"Zachariadis","sequence":"first","affiliation":[{"name":"Institute of Chemical Technologies and Analytics Vienna University of Technology  Vienna Austria"},{"name":"Laboratory of Analytical Chemistry Department of Chemistry Aristotle University  Thessaloniki Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erwin","family":"Rosenberg","sequence":"additional","affiliation":[{"name":"Institute of Chemical Technologies and Analytics Vienna University of Technology  Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,6,12]]},"reference":[{"key":"e_1_2_6_2_1","volume-title":"IPCS. 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