Electrochemical Characterizations of Quaternarized Nanodiamond-Myoglobin Modified Electrode
10.11895/j.issn.0253-3820.140093
- VernacularTitle:季铵盐化纳米金刚石-肌红蛋白修饰电极的电化学行为
- Author:
Xiaoling MA
;
Chengjun DING
;
Pu ZHANG
;
Wei GUO
;
Hongxia LUO
- Publication Type:Journal Article
- Keywords:
Quaternarized nanodiamond;
Myoglobin;
Chemically modified electrode;
Cyclic voltammetry;
Hydrogen peroxide
- From:
Chinese Journal of Analytical Chemistry
2014;(9):1332-1337
- CountryChina
- Language:Chinese
-
Abstract:
Through a series of chemical reactions, a kind of quaternary ammonium salt derivative of nanodiamond, ND-CO-NH-CH2-CH2-N ( CH3 ) 3+· I-( QAS-ND ) , was obtained , which was confirmed by FTIR, element analysis experiment and the electrochemistry measurements. Mixed myoglobin ( Mb) and QAS-ND solution was dropped on the surface of the glassy carbon ( GC ) electrode to prepare QAS-ND/Mb/GC modified electrode. In 0. 1 mol/L phosphate buffer solution (PBS) (pH 7. 0), Mb in the membrane exhibited direct electrochemical properties and showed good stability. The electrocatalytic property of the modified electrode toward H2 O2 was investigated, the results showed that the modified electrode could be used as the H2O2 biosensor to achieve fast, accurate detection of H2O2, with a detection limit of 3. 5 mmol/L (S/N=3).
