Electrocatalytic Oxidation of Nitric Oxide at Carbon Black Microelectrode Modified with Nickel Complex of N-Salicylidene Glutamic Acid

Preparation of carbon black microelectrode modified with nickel complex of N-salicylidene glutamic acid was described and electrocatalytic oxidation behavior of nitric oxide (NO) at the electrode was studied.As shown by the experimental results,in a phoshpate buffer medium of pH 6.8,linear relationship was found between the catalytic peak current and concentration of nitric oxide in the range of 4.0×10-8-1.0×10-5mol·L-1 with a detection limit (3σ) of 1.0×10-8mol·L-1.Precision was tested at the concentration level of 1.0×10-6mol·L-1 of NO,the value of RSD′s (n=10) obtained was 2.2%.In its application to the analysis of 3 simulated samples,the values of RSD′s (n=8) and recovery found were in the ranges of 1.9%-2.8% and 97%-105% respectively.