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A two\u2010electrode configuration was employed with an indium\/tin oxide\u2010coated glass as a working electrode and a platinum wire as a pseudoreference electrode. The ECL system also contains a flow cell (poly(dimethylsiloxane)\u2010aluminum oxide) that was made from a mixture of Sylgard 184 silicone elastomer, a curing agent, and aluminum oxide. In order to improve the sensitivity of the present CE\u2010ECL system using tris(2,2'\u2010bipyridyl) ruthenium(II) (Ru(bpy)<jats:sub>3<\/jats:sub><jats:sup>2+<\/jats:sup>), a stacking approach based on pH junctions and field amplification has been tested for the analysis of triethylamine (TEA), tripropylamine (TPA), and tributylamine (TBA). Once amines (cations) prepared in citric acid solution (pH\u2005&lt;\u20054.0) migrate towards the background electrolyte (15\u2009m<jats:sc>M<\/jats:sc> sodium borate at pH\u20058.0), they slow down and are stacked at the boundary as a result of deprotonation and decreases in the electric field. By applying hydrodynamic injection of the sample for 60\u2009s, this method provides the concentration limits of detection (signal\u2010to\u2010noise ratio\u2005=\u20053) of 24, 20, and 32\u2009n<jats:sc>M<\/jats:sc> for TEA, TPA, and TBA, respectively. The results indicate that the stacking CE\u2010ECL system is better than CE\u2010ECL systems using a two\u2010electrode configuration and comparable to those using a three\u2010electrode configuration. The potential applicability of the new and low\u2010cost CE\u2010ECL system has been demonstrated by the determination of 1.0\u2005\u00b5<jats:sc>M<\/jats:sc> lidocaine, a local anesthetic drug, in urine without any tedious sample preparation.<\/jats:p>","DOI":"10.1002\/elps.200500009","type":"journal-article","created":{"date-parts":[[2005,7,1]],"date-time":"2005-07-01T09:22:44Z","timestamp":1120209764000},"page":"2984-2990","source":"Crossref","is-referenced-by-count":35,"title":["Determination of tertiary amines based on pH junctions and field amplification in capillary electrophoresis with electrochemiluminescence detection"],"prefix":"10.1002","volume":"26","author":[{"given":"Mallipattu","family":"Sreedhar","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yang\u2010Wei","family":"Lin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei\u2010Lung","family":"Tseng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huan\u2010Tsung","family":"Chang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,8,2]]},"reference":[{"key":"e_1_2_1_2_2","first-page":"1","volume-title":"Electroanalytical Chemistry","author":"Faulkner L. 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