Microfluidics, Sensors and Diagnostics (µSenD) Laboratory, Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; Department of BioSystems Science and Engineering (BSSE), Indian Institute of Science Bangalore, CV Raman Rd, Bengaluru, Karnataka 560012, India.
Department of Information Technology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
Food Chem. 2023 Mar 1;403:134484. doi: 10.1016/j.foodchem.2022.134484. Epub 2022 Oct 1.
Herein, we present for the first time, the employment of paper-based devices for rapidly differentiating original country eggs from the plain broiler eggs that have been coated with tea to appear as the former. The devices leverage two types of phenomena involving the phenols present in tea in precisely 5 min, namely precipitation, which produces a well-defined dark bluish precipitate on the surface of the counterfeit country eggs or tea-coated broiler eggs and de-coloration, wherein the dried layer of tea coating present on the surface of the dummy country eggs get dissolved, thereby revealing the white colour of the plain broiler egg shell. To reduce the subjectivity, a smartphone application 'Eggo' has been developed which is capable of detecting the spots produced by both the methods using mobile's camera. Fourier Transform Infrared Spectroscopy (FTIR) analysis was performed to study the changes occurring on the shell surface. Such sophisticated yet simple technologies will revolutionize food fraud analysis.
在此，我们首次提出了一种基于纸张的设备，用于快速区分原始产地鸡蛋和涂有茶叶以冒充前者的普通肉鸡鸡蛋。该设备利用了两种涉及茶叶中酚类物质的现象，在 5 分钟内即可完成，即沉淀，在假冒的产地鸡蛋或涂有茶叶的肉鸡鸡蛋表面产生明显的深蓝色沉淀，以及褪色，其中涂有茶叶的干燥层在假产地鸡蛋表面溶解，从而露出普通肉鸡鸡蛋壳的白色。为了减少主观性，我们开发了一个名为“Eggo”的智能手机应用程序，它可以使用移动设备的摄像头检测这两种方法产生的斑点。傅里叶变换红外光谱（FTIR）分析用于研究壳表面发生的变化。这种复杂但简单的技术将彻底改变食品欺诈分析。
