快速电分析程序用于测定实际样品中的芝麻酚。

Rapid electroanalytical procedure for sesamol determination in real samples.

机构信息

University of Lodz, Department of Inorganic and Analytical Chemistry, 12 Tamka Str, Lodz 91-403, Poland.

University of Lodz, Department of Environmental Chemistry, 163 Pomorska Str, Lodz 90-236, Poland.

出版信息

Food Chem. 2020 Mar 30;309:125789. doi: 10.1016/j.foodchem.2019.125789. Epub 2019 Oct 25.

DOI:10.1016/j.foodchem.2019.125789

PMID:31704073

Abstract

In this study, the development of an electroanalytical assay based on square wave voltammetry technique for determining sesamol (Ses) in sesame oil samples is described. The influence of various factors such as pH of the supporting electrolyte, its composition, and SW (square wave) parameters was studied. Linearity of the peak current depended on the concentration of Ses in the range from 3.0 to 140.0 μmol L with a limit of detection of 0.71 μmol L. Furthermore, the cyclic voltammetric behavior of Ses and the effects of scan rate and pH on the peak current and peak potential of Ses were determined. Moreover, the electrode process was found to be diffusion-controlled. The proposed methodology was successfully applied for determining Ses in commercial sesame oil samples. The obtained results were in good agreement with the results from the HPLC-UV reference method.

摘要

本研究描述了一种基于方波伏安技术的电分析测定法的发展，用于测定芝麻油样品中的芝麻酚（Ses）。研究了各种因素的影响，如支持电解质的 pH 值、组成和 SW（方波）参数。峰电流的线性与 Ses 的浓度在 3.0 至 140.0 μmol·L 范围内有关，检出限为 0.71 μmol·L。此外，还确定了 Ses 的循环伏安行为以及 Ses 的峰电流和峰电位对扫描速率和 pH 的影响。此外，发现电极过程受扩散控制。该方法成功应用于测定商业芝麻油样品中的 Ses。所得结果与 HPLC-UV 参考方法的结果吻合良好。