Faculty of Food Engineering, Stefan cel Mare University of Suceava, Suceava, Romania.
J Sci Food Agric. 2018 Aug;98(11):4304-4311. doi: 10.1002/jsfa.8956. Epub 2018 Mar 25.
The aim of this study was to evaluate the usefulness of a voltammetric e-tongue (three electrodes: reference electrode (Ag/AgCl), counter electrode (glassy carbon electrode rod) and working electrode (Au, Ag, Pt and glass electrode)) for honey adulteration detection. For this purpose, 55 samples of authentic honey (acacia, honeydew, sunflower, Tilia and polyfloral) and 150 adulterated ones were analyzed. The adulteration was made using fructose, glucose, inverted sugar, hydrolyzed inulin syrup and malt wort at different percentages: 5%, 10%, 20%, 30%, 40% and 50%, respectively. The e-tongue has been compared with the physicochemical parameters (pH, free acidity, electrical conductivity (EC) and CIELab* parameters (L*, a* and b*)) in order to achieve a suitable method for the classification of authentic and adulterated honeys.
The e-tongue and physicochemical parameters reached a 97.50% correct classification of the authentic and adulterated honeys. In the case of the adulterated honey samples, the e-tongue achieved 83.33% correct classifications whereas the physicochemical parameters only achieved 73.33%.
The e-tongue is a fast, easy and accurate method for honey adulteration detection which can be used in situ by beekeepers and provide useful information on EC and free acidity. © 2018 Society of Chemical Industry.
本研究旨在评估电化学舌头（三个电极：参比电极（Ag/AgCl）、对电极（玻璃碳电极棒）和工作电极（金、银、铂和玻璃电极））在蜂蜜掺假检测中的有用性。为此，分析了 55 个真实蜂蜜（刺槐、蜜露、向日葵、椴树和百花）和 150 个掺假蜂蜜样品。掺假物分别为果糖、葡萄糖、转化糖、水解菊糖糖浆和麦芽汁，掺假比例为 5%、10%、20%、30%、40%和 50%。为了实现对真假蜂蜜的分类，将电化舌与理化参数（pH 值、游离酸度、电导率（EC）和 CIELab参数（L、a和 b））进行了比较。
电化舌和理化参数对真假蜂蜜的正确分类率达到 97.50%。在掺假蜂蜜样品中，电化舌正确分类率为 83.33%，而理化参数仅为 73.33%。
电化舌是一种快速、简便、准确的蜂蜜掺假检测方法，养蜂人可以现场使用，并提供有关 EC 和游离酸度的有用信息。© 2018 化学工业协会。
