离子液体
碳纳米管
氢氧化物
电极
碳糊电极
检出限
电化学
纳米颗粒
钴
电化学气体传感器
材料科学
碳纤维
离子键合
无机化学
化学
核化学
复合数
色谱法
纳米技术
有机化学
循环伏安法
催化作用
离子
物理化学
复合材料
作者
Ali Babaei,Alireza Taheri,Iman Farahani
标识
DOI:10.1016/j.snb.2013.03.101
摘要
A novel modified carbon ionic liquid electrode (CILE) is prepared as an electrochemical sensor for simultaneous determination of levodopa (l-Dopa) and melatonin (Mel). The experimental results suggest that a carbon ionic liquid electrode modified with multi-walled carbon nanotubes and cobalt hydroxide nanoparticles accelerates the electron transfer reactions of l-Dopa and Mel. The fabricated sensor revealed some advantages such as convenient preparation, good stability and high sensitivity. The DPV data in 0.1 M phosphate buffer solution (PBS) (pH 7.5) allowed a method to be developed for the determination of l-Dopa and Mel concentrations in the ranges 0.1–300 and 0.01–50 μM, with the detection limits of 0.075 and 0.004 μM, respectively. The proposed method was successfully applied to determinations of these compounds in some pharmaceutical and human urine samples.
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