An amperometric biosensor of determination H2O2 based on horseradish peroxidase in carbon nanotubes/ionic liquid

A novel amperometric biosensor for the determination of h2o2 based on horseradish peroxidase (hrp) in nanocomposite material of muti-walled carbon nanotubes/ionic liquid was explored. cyclic voltammetry (cv) was used to characterize the performance of the biosensor. under the optimized experimental conditions,h2o2 could be detected in a linear calibration range of 0.5 × 10-6 m ~ 6.0 × 10-6 m with a correlation coefficient of 0.9902 (n = 7),a detection limit of 1.5 × 10-7 m at 3σ and the recovery ratio was of 96.2% ~ 110.8%,which indicated that the accuracy of this method is also satisfied. the modified electrodes display more excellent electrochemical performance,high sensitivity,good reproducibility,and long-term stability.