State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, Changsha, PR China.
Colloids Surf B Biointerfaces. 2011 Nov 1;88(1):402-6. doi: 10.1016/j.colsurfb.2011.07.021. Epub 2011 Jul 20.
A simple, sensitive, and reliable method based on a multi-walled carbon nanotubes (MWNTs) modified carbon ionic liquid electrode (CILE) has been successfully developed for determination of dopamine (DA) in the presence of ascorbic acid (AA). The acid-treated MWNTs with carboxylic acid functional groups could promote the electron-transfer reaction of DA and inhibit the voltammetric response of AA. Due to the good performance of the ionic liquid, the electrochemical response of DA on the MWNTs/CILE was better than that of other MWNTs modified electrodes. Under the optimum conditions a linear calibration plot was obtained in the range 5.0×10(-8) to 2.0×10(-4) mol L(-1) and the detection limit was 1.0×10(-8) mol L(-1).
基于多壁碳纳米管（MWNTs）修饰碳离子液体电极（CILE），我们成功开发了一种简单、灵敏、可靠的方法，用于在抗坏血酸（AA）存在的情况下测定多巴胺（DA）。经过酸处理的 MWNTs 带有羧酸官能团，可促进 DA 的电子转移反应并抑制 AA 的伏安响应。由于离子液体的优良性能，DA 在 MWNTs/CILE 上的电化学响应优于其他 MWNTs 修饰电极。在最佳条件下，该方法在 5.0×10(-8) 到 2.0×10(-4) mol L(-1) 的范围内呈现出良好的线性校准曲线，检测限为 1.0×10(-8) mol L(-1)。
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