Department of Physics, Science and Research Branch, Islamic Azad University, Mazandaran, Iran.
Environ Sci Pollut Res Int. 2013 Sep;20(9):6584-93. doi: 10.1007/s11356-013-1733-7. Epub 2013 Apr 23.
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 μmol L(-1), respectively. The detection limits for HX and PL were 0.08 and 2.0 μmol 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.
采用 p-氯代邻苯二腈和碳纳米管修饰的碳糊电极，用于灵敏和选择性测定羟胺（HX）和苯酚（PL）。通过循环伏安法（CV）、计时电流法和电化学阻抗谱研究了 HX 在修饰电极上的氧化。计算了 HX 的催化速率常数（k）和扩散系数（D）的值。HX 和 PL 的方波伏安峰电流在 0.1-172.0 和 5.0-512.0 μmol L(-1)范围内分别与其浓度呈线性关系。HX 和 PL 的检测限分别为 0.08 和 2.0 μmol L(-1)。使用方波伏安法，HX 和 PL 的阳极峰电位的分离达到 0.65 V。该传感器成功应用于水样和废水中 HX 和 PL 的测定。
