Gazi University, Technical Sciences Vocational High School, Ankara, Turkey.
Food Chem. 2024 Mar 15;436:137752. doi: 10.1016/j.foodchem.2023.137752. Epub 2023 Oct 15.
The electrochemical sensor for simultaneous determination of ferulic acid (FA) and vanillin (VA) was prepared by electrochemical deposition of 2-aminonicotinic acid (2-ANA) on the glassy carbon (GC) electrode. The voltammetric determination of FA and VA was performed in the BR buffer solution in the presence of sodium dodecyl sulfate as a surfactant with SWV. The parameters of the SWV technique were optimized by response surface methodology experimental design. Under optimized conditions, the 2-ANA/GC modified electrode presented a linear working range of 2.8 × 10 M to 7.50 × 10 M and 7.50 × 10 M to 2.45 × 10 M for FA, 3.06 × 10 M to 1.27 × 10M for VA. The detection limit (LOD) values for FA and VA were 6.87 nM and 9.23 nM, respectively. Using the 2-ANA/GC sensor, concentrations of FA and VA in instant coffee and milk samples were determined with %recovery values between 103.40 and 97.07 and %RSD values between 0.76 and 4.40.
电化学传感器用于同时测定阿魏酸（FA）和香草醛（VA），通过在玻碳电极上电沉积 2-氨基烟酸（2-ANA）来制备。在存在十二烷基硫酸钠作为表面活性剂的 BR 缓冲溶液中，采用 SWV 进行 FA 和 VA 的伏安测定。通过响应面法实验设计优化 SWV 技术的参数。在优化条件下，2-ANA/GC 修饰电极对 FA 的线性工作范围为 2.8×10-6 M 至 7.50×10-5 M 和 7.50×10-5 M 至 2.45×10-5 M，对 VA 的线性工作范围为 3.06×10-6 M 至 1.27×10-5 M。FA 和 VA 的检测限（LOD）值分别为 6.87 nM 和 9.23 nM。使用 2-ANA/GC 传感器，测定了速溶咖啡和牛奶样品中 FA 和 VA 的浓度，回收率值在 103.40%至 97.07%之间，相对标准偏差（RSD）值在 0.76%至 4.40%之间。
