Sensitive Amperometric Detection of Hydrazine Using A Rutin/Graphene-Chitosan Nanocomposite Modified Glassy Carbon Electrode

The present study describes a new approach for the investigation of electrocatalytic oxidation of hydrazine by using a glassy carbon electrode (gce) modified by graphene chitosan nanocomposite (gr-cs) and rutin (ru). the heterogeneous electron transfer rate constant (ks) and the surface coverage of immobilized ru on the gr‒cs/gce were obtained as 63 s−1 and 4.48×10−11 mole cm−2, respectively. the designed sensor showed excellent electrocatalytic activity toward oxidation of hydrazine. the catalytic rate constant (kcat) of the modified electrode toward n2h4 is 6.3 ×103 m-1s-1. linear relationship between amperometric current response and hydrazine concentration was observed in the range of 0.3-1500 μm and the limit of detection was 90 nm (s/n=3). in addition, the modified electrode has an excellent anti-interference property in the presence of other potentially interfering species as well as a good operational stability. to evaluate the applicability of the proposed sensor, it was employed to determine hydrazine in a drinking water sample.