论文部分内容阅读
A sensitive and selective electrochemical sensor for the determination of glutathione(GSH) was developed using a modified multiwall carbon nanotube paste electrode with 3,4 dihydroxy cinnamic acid as a mediator.This modified electrode showed very high electrocatalytic activity for the anodic oxidation of GSH.Under the optimized conditions,the electrocatalytic peak current showed a linear relationship with GSH concentration in the range of 0.5-400.0 μmol/L with a detection limit of 0.1 μmol/L GSH.The relative standard deviations for seven successive assays of 5.0 and 25.0 μmol/L GSH were 2.2% and 2.7%,respectively.The modified electrode was used for the determination of GSH compounds in real urine samples.
A sensitive and selective electrochemical sensor for the determination of glutathione (GSH) was developed using a modified multiwall carbon nanotube paste electrode with 3,4 dihydroxy cinnamic acid as a mediator. This modified electrode showed very high electrocatalytic activity for the anodic oxidation of GSH. Under the optimized conditions, the electrocatalytic peak current showed a linear relationship with GSH concentration in the range of 0.5-400.0 μmol / L with a detection limit of 0.1 μmol / L GSH. The relative standard deviations for seven successive assays of 5.0 and 25.0 μmol / L GSH were 2.2% and 2.7% respectively. The modified electrode was used for the determination of GSH compounds in real urine samples.