Dipartimento di Chimica, Università degli Studi di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy.
CNR-IPCF Istituto per i Processi Chimico-Fisici, Sez. Bari, c/o Dip. Chimica Via Orabona 4, 70126 Bari, Italy; INSTM, Via G. Giusti 9, 50121 Firenze, Italy.
Food Chem. 2021 May 15;344:128692. doi: 10.1016/j.foodchem.2020.128692. Epub 2020 Nov 23.
An easy and reliable method based on a novel electroanalytical nanostructured sensor has been developed to perform quantification of vitamin C in commercial and fortified cow-milk-based formulae and foods for infants and young children. The work is motivated by the need of a reliable analytical tool to be applied in quality control laboratories for the quantitative assessment of vitamin C where its rapid and cost-effective monitoring is essential. The ad hoc designed sensor, based on disposable screen-printed carbon electrodes modified with Au nanoparticles decorated reduced graphene oxide flakes, exhibits a LOD of 0.088 mg L. The low cost, easy sample preparation, fast response and high reproducibility (RSD ≈ 8%) of the proposed method highlight its suitability for usage in quality control laboratories for determining vitamin C in real complex food matrices, envisaging the application of the sensing platform in the determination of other compounds relevant in food chemistry and food manufacturing.
一种基于新型电分析纳米结构传感器的简单可靠的方法已经被开发出来，用于对商业和强化牛奶配方食品以及婴幼儿食品中的维生素 C 进行定量分析。这项工作的动机是需要一种可靠的分析工具，应用于质量控制实验室，对维生素 C 进行定量评估，因为快速和具有成本效益的监测是必不可少的。该传感器是专门设计的，基于金纳米粒子修饰还原氧化石墨烯片的一次性丝网印刷碳电极，其检测限为 0.088mg/L。该方法具有低成本、易于样品制备、快速响应和高重现性（RSD≈8%）的特点，突出了其在质量控制实验室中用于测定实际复杂食品基质中维生素 C 的适用性，设想将传感平台应用于测定食品化学和食品制造中其他相关化合物。
