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The heavy metal ions were preconcentrated on the surface of the modified electrode at \u22121.1\u2005V vs. SCE where they complex with 2\u2010benzothiazolethiol and are reduced to the metals, and are then reoxidized. Optimum SWASV conditions lead to nanomolar detection limits and simultaneous determination of Cd<jats:sup>2+<\/jats:sup>, Pb<jats:sup>2+<\/jats:sup>, Cu<jats:sup>2+<\/jats:sup> and Hg<jats:sup>2+<\/jats:sup> in natural waters was achieved.<\/jats:p>","DOI":"10.1002\/elan.200900167","type":"journal-article","created":{"date-parts":[[2009,11,12]],"date-time":"2009-11-12T11:13:45Z","timestamp":1258024425000},"page":"61-68","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":71,"title":["Simultaneous Determination of Cadmium, Lead, Copper and Mercury Ions Using Organofunctionalized SBA\u201015 Nanostructured Silica Modified Graphite\u2013Polyurethane Composite Electrode"],"prefix":"10.1002","volume":"22","author":[{"given":"Ivana","family":"Cesarino","sequence":"first","affiliation":[]},{"given":"\u00c9der\u2005T.\u2005G.","family":"Cavalheiro","sequence":"additional","affiliation":[]},{"given":"Christopher\u2005M.\u2005A.","family":"Brett","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2009,12,23]]},"reference":[{"key":"e_1_2_1_1_2","volume-title":"Molecular Design of Electrode Surfaces, in Techniques of Chemistry"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/elan.1140030404"},{"key":"e_1_2_1_3_2","first-page":"95","volume":"54","author":"Labuda J.","year":"2000","journal-title":"Chem. 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