Yang Jichun, Wang Qiong, Zhang Minhui, Zhang Shuming, Zhang Lei
College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang 110036, People's Republic of China.
Food Chem. 2015 Nov 15;187:1-6. doi: 10.1016/j.foodchem.2015.04.009. Epub 2015 Apr 15.
In this study, a simple, rapid, sensitive and environmentally friendly electroanalytical detection method for pyrimethanil (PMT) was developed, which was based on multi-walled carbon nanotubes (MWCNTs) and ionic liquids (IL) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) modified glassy carbon electrode (GCE). MWCNTs-IL modified electrode significantly enhanced the oxidation peak current of PMT by combining the excellent electrochemical properties of MWCNTs and IL, suggesting that the modified electrode can remarkably improve the sensitivity of PMT detection. Under the optimum conditions, this electrochemical sensor exhibited a linear concentration range for PMT of 1.0 × 10(-7)-1.0 × 10(-4) mol L(-1) and the detection limit was 1.6 × 10(-8) mol L(-1) (S/N = 3). The fabricated electrode showed good reproducibility, stability and anti-interference, and also it was successfully employed to detect PMT in real samples.
本研究基于多壁碳纳米管（MWCNTs）和离子液体（IL）1-丁基-3-甲基咪唑六氟磷酸盐（[BMIM][PF6]）修饰的玻碳电极（GCE），开发了一种用于嘧霉胺（PMT）的简单、快速、灵敏且环境友好的电分析检测方法。MWCNTs-IL修饰电极通过结合MWCNTs和IL优异的电化学性质，显著增强了PMT的氧化峰电流，表明修饰电极可显著提高PMT检测的灵敏度。在最佳条件下，该电化学传感器对PMT的线性浓度范围为1.0×10(-7)-1.0×10(-4) mol L(-1)，检测限为1.6×10(-8) mol L(-1)（S/N = 3）。制备的电极具有良好的重现性、稳定性和抗干扰性，并且成功用于实际样品中PMT的检测。
