期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 20, 期 9, 页码 6584-6593出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-013-1733-7
关键词
Hydroxylamine; Phenol; p-Chloranil; Multiwall carbon nanotubes paste electrode; Voltammetry
资金
- Qaemshahr and Science and Research Branch, Islamic Azad University
- Iranian Nanotechnology Initiative Council
A carbon paste electrode modified with p-chloranil and carbon nanotubes was used for the sensitive and selective voltammetric determination of hydroxylamine (HX) and phenol (PL). The oxidation of HX at the modified electrode was investigated by cyclic voltammetry (CV), chronoamperommetry, and electrochemical impedance spectroscopy. The values of the catalytic rate constant (k), and diffusion coefficient (D) for HX were calculated. Square wave voltammetric peaks current of HX and PL increased linearly with their concentrations at the ranges of 0.1-172.0 and 5.0-512.0 mu mol L-1, respectively. The detection limits for HX and PL were 0.08 and 2.0 mu mol L-1, respectively. The separation of the anodic peak potentials of HX and PL reached to 0.65 V, using square wave voltammetry. The proposed sensor was successfully applied for the determination of HX and PL in water and wastewater samples.
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