Electroanalysis of sulfonamides by flow injection system/high-performance liquid chromatography coupled with amperometric detection using boron-doped diamond electrode☆

Autor:	Orawon Chailapakul, Suchada Chuanuwatanakul, Shoji Motomizu, Anchana Preechaworapun, Yasuaki Einaga, Kate Grudpan
Rok vydání:	2006
Předmět:	Detection limit Analytical chemistry chemistry.chemical_element Diamond Standard solution engineering.material Amperometry Analytical Chemistry chemistry Linear range Electrode engineering Cyclic voltammetry Boron
Zdroj:	Talanta. 68:1726-1731
ISSN:	0039-9140
DOI:	10.1016/j.talanta.2005.08.040
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7942ce91c3c5900825c26fcd719d17 https://doi.org/10.1016/j.talanta.2005.08.040 Zobrazit plný text záznamu Full Text from ScienceDirect