- Turkish Journal of Chemistry
- Vol: 34 Issue: 6
- Nile Blue-hexacyanoferrate carbon paste modified electrode as an amperometric sensor for determinati...
Nile Blue-hexacyanoferrate carbon paste modified electrode as an amperometric sensor for determination of hydrazine
Authors : Reza Emamali Sabzi, Elnaz Minaie, Khalil Farhadi, Mir Maqsoud Golzan
Pages : 901-910
View : 13 | Download : 4
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :The main problem associated with metal hexacyanoferrates (MHCFs) is their instability at high pH values. We synthesized a new Prussian Blue analogue, Nile-Blue hexacyanoferrate (NBHCF), that remains stable in 0.2 M KOH. A carbon paste (CPE) chemically modified electrode (ME) containing NBHCF was prepared as a stable electrochemical sensor for measuring hydrazine. A detailed characterization of the electrochemical and electrocatalytic behavior of NBHCF was performed using cyclic voltammetric, chronoamperometric, differential pulse voltammetric (DPV) and hydrodynamic amperometric methods. The NBHCF-modified electrode produced reproducible redox peaks and resulted in a linear increase in the oxidation signal of hydrazine with increasing concentration of hydrazine in the range of 0.1-6.0 mM (in hydrodynamic amperometry method (HDA)). The electrode detection limit was 40 m M and possessed a surface coverage of G = 2.0 \times 10-8 mol cm-2.Keywords : Modified electrode, carbon paste electrode, hexacyanoferrate, amperometric determination of hydrazine, Nile-Blue hexacyanoferrate