Baytak Aysegul Kutluay, Aslanoglu Mehmet
Department of Medical Laboratory, University of Harran, Sanliurfa 63510, Turkey.
Department of Chemistry, University of Harran, Sanliurfa 63510, Turkey.
Food Chem. 2017 Aug 1;228:152-157. doi: 10.1016/j.foodchem.2017.01.161. Epub 2017 Feb 3.
A voltammetric platform based on modifying glassy carbon electrodes (GCEs) with ruthenium nanoparticles decorated carbon nanotubes (CNTs) was applied for the determination of capsaicin in pepper samples. The nanoparticles of ruthenium (RuNPs) were obtained at carbon nanotubes modified GCE by cyclic voltammetry. The composite of RuNPs-CNTs was characterized by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). The proposed voltammetric platform, RuNPs/CNTs/GCE, highly improved the voltammetric process of capsaicin in comparison to the CNTs/GCE and bare GCE. A linear concentration range was obtained from 1.0×10 to 4.1×10M (R=0.9987) with a detection limit of 2.5×10M. The voltammetric platform has successfully been applied for quantifying capsaicin in various pepper samples including Isot. The proposed voltammetric platform offers advantages such as high sensitivity, selectivity and precision.
一种基于用钌纳米颗粒修饰的碳纳米管（CNTs）修饰玻碳电极（GCEs）的伏安平台被用于测定辣椒样品中的辣椒素。通过循环伏安法在碳纳米管修饰的玻碳电极上获得钌纳米颗粒（RuNPs）。通过扫描电子显微镜（SEM）和能量色散X射线（EDX）对RuNPs-CNTs复合材料进行了表征。与CNTs/GCE和裸玻碳电极相比，所提出的伏安平台RuNPs/CNTs/GCE极大地改善了辣椒素的伏安过程。获得了1.0×10至4.1×10M的线性浓度范围（R = 0.9987），检测限为2.5×10M。该伏安平台已成功应用于定量各种辣椒样品（包括伊索托辣椒）中的辣椒素。所提出的伏安平台具有高灵敏度、选择性和精密度等优点。
