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Title: Electroanalysis of sulfonamides by flow injection system/high-performance liquid chromatography coupled with amperometric detection using boron-doped diamond electrode
Authors: Anchana Preechaworapun
Suchada Chuanuwatanakul
Yasuaki Einaga
Kate Grudpan
Shoji Motomizu
Orawon Chailapakul
Keywords: Chemistry
Issue Date: 28-Feb-2006
Abstract: Sulfonamides (SAs) were electrochemically investigated using cyclic voltammetry at a boron-doped diamond (BDD) electrode. Comparison experiments were carried out using a glassy carbon electrode. The BDD electrode provided well-resolved oxidation, irreversible cyclic voltammograms and higher current signals when compared to the glassy carbon electrode. Results obtained from using the BDD electrode in a flow injection system coupled with amperometric detection were illustrated. The optimum potential from a hydrodynamic voltammogram was found to be 1100 mV versus Ag/AgCl, which was chosen for the HPLC-amperometric system. Excellent results of linear range and detection limit were obtained. This method was also used for determination of sulfonamides in egg samples. The standard solutions of 5, 10, and 15 ppm were spiked in a real sample, and percentage of recoveries was found to be between 90.0 and 107.7. © 2005 Elsevier B.V. All rights reserved.
ISSN: 00399140
Appears in Collections:CMUL: Journal Articles

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