Nile Blue-hexacyanoferrate carbon paste modified electrode as an amperometric sensor for determination of hydrazine

Authors

REZA SABZI
ELNAZ MINAIE
KHALIL FARHADI
MIRMAQSOUD GOLZAN

DOI

10.3906/kim-0912-424

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 \mu M and possessed a surface coverage of \Gamma = 2.0 \times 10^{-8} mol cm^{-2}.

Keywords

Modified electrode, carbon paste electrode, hexacyanoferrate, amperometric determination of hydrazine, Nile-Blue hexacyanoferrate

First Page

901

Last Page

910

Recommended Citation

SABZI, REZA; MINAIE, ELNAZ; FARHADI, KHALIL; and GOLZAN, MIRMAQSOUD (2010) "Nile Blue-hexacyanoferrate carbon paste modified electrode as an amperometric sensor for determination of hydrazine," Turkish Journal of Chemistry: Vol. 34: No. 6, Article 7. https://doi.org/10.3906/kim-0912-424
Available at: https://journals.tubitak.gov.tr/chem/vol34/iss6/7