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An Electrochemical Nanocomposite Modified Carbon Paste Electrode As A Sensor For Simultaneous Determination Of Hydrazine And Phenol In Water And Wastewater Samples, Environ. Sci. Pollut. Res., 2014, 21(9), 5879-5888.

In this study, we report preparation of a high sensitive
electrochemical sensor for determination of hydrazine in
the presence of phenol in water and wastewater samples. In
the first step, we describe synthesis and characterization of
ZnO/CNTs nanocomposite with different methods such as
transmission electron microscopy (TEM) and X-ray diffraction
(XRD). In the second step, application of the synthesis
nanocomposite describes the preparation of carbon paste electrode
modified with N-(4-hydroxyphenyl)-3,5-
dinitrobenzamide as a high sensitive and selective
voltammetric sensor for determination of hydrazine and phenol
in water and wastewater samples. The mediated oxidation
of hydrazine at the modified electrode was investigated by
cyclic voltammetry, chronoamperometry, and electrochemical
impedance spectroscopy (EIS). Also, the values of catalytic
rate constant (k) and diffusion coefficient (D) for hydrazine
were calculated. Square wave voltammetry (SWV) of hydrazine
at the modified electrode exhibited two linear dynamic
ranges with a detection limit (3σ) of 8.0 nmol L−1. SWV was
used for simultaneous determination of hydrazine and phenol
at the modified electrode and quantitation of hydrazine and
phenol in some real samples by the standard addition method.

Journal Papers
Month/Season: 
July
Year: 
2014