Electrochemical oxidation, adsorption and quantification of 1,2-benzopyrone employing a glassy carbon electrode

Journal of the Brazilian Chemical Society

Azevedo, Luiz Fernando M. de¹  Lucho, Alzira M. S.¹  University of Campinas (Unicamp), Campinas, Brazil¹  Trevisan, Marcello G.¹  Federal University of Alfenas (UNIFAL-MG), Alfenas, Brazil¹  Garcia, Jerusa S.¹ 

关键词: 1;    2-benzopyrone;    guaco;    adsorption process;    multivariate optimization;   

DOI  :  10.5935/0103-5053.20140004

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The electrooxidation of 1,2-benzopyrone (BP) was assessed via linear voltammetry and electrochemical impedance spectroscopy on a glassy carbon electrode in dibasic potassium phosphate buffer. The oxidation process for BP requires one electron and forms a ketone. This oxidation product was adsorbed by the electrode surface to form a film that blocks active sites and increases in thickness over consecutive measurements. The oxidation conditions were optimized using factorial design and Doehlert matrices. This electrochemical method was compared to high performance liquid chromatography (HPLC), which has a detection limit of 26.4 µmol L-1 for BP. The voltammetric results were statistically similar to those from HPLC; however, the method was faster, simpler, more easily acquired, more sensitive, and required less organic solvent.

【 授权许可】

Unknown