Fu Li, Zheng Yuhong, Wang Aiwu, Cai Wen, Lin Haitao
Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region.
Food Chem. 2015 Aug 15;181:127-32. doi: 10.1016/j.foodchem.2015.02.032. Epub 2015 Feb 14.
A novel poly (diallyldimethylammonium chloride) functionalized reduced graphene oxide (PDDA-RGO) nanocomposite modified electrode was fabricated, and applied for the electrochemical determination of quinoline yellow (QY). The formation of PDDA-RGO nanocomposite was confirmed by SEM, FTIR and Raman spectroscopy. The electrocatalytic activity of PDDA-RGO nanocomposite to the oxidation of QY was evaluated using cyclic voltammetry and differential pulse voltammetry. Under the optimal conditions, the proposed sensor exhibited excellent electrochemical performance towards detection of QY. The linear range is from 0.01 to 10 μM, and the detection limit is down to 0.002 μM (S/N=3). The proposed sensor also exhibited excellent anti-interference property, repeatability and stability. In addition, the proposed electrochemical sensor was successfully applied to determination of QY in soft drink.
制备了一种新型的聚二烯丙基二甲基氯化铵功能化还原氧化石墨烯（PDDA-RGO）纳米复合修饰电极，并将其应用于喹啉黄（QY）的电化学测定。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和拉曼光谱证实了PDDA-RGO纳米复合材料的形成。采用循环伏安法和差分脉冲伏安法评估了PDDA-RGO纳米复合材料对QY氧化的电催化活性。在最佳条件下，所提出的传感器对QY检测表现出优异的电化学性能。线性范围为0.01至10μM，检测限低至0.002μM（S/N = 3）。所提出的传感器还表现出优异的抗干扰性能、重复性和稳定性。此外，所提出的电化学传感器成功应用于软饮料中QY的测定。
