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Paper-based dots and smartphone for detecting counterfeit country eggs

Ray, R and Goyal, A and Prabhu, A and Parekkh, S and Maddasani, S and Mani, NK (2023) Paper-based dots and smartphone for detecting counterfeit country eggs. In: Food Chemistry, 403 .

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Official URL: https://doi.org/10.1016/j.foodchem.2022.134484


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.

Item Type: Journal Article
Publication: Food Chemistry
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd. .
Keywords: Crime; Fourier transform infrared spectroscopy, Colouration; Country egg; De-coloration; Eggo app; Microfluidics devices; Paper based devices; Paper-based microfluidic device; Paper-based microfluidics; Smart phones; White color, Smartphones, Article; broiler; colorimetry; controlled study; counterfeiting; egg; Fourier transform infrared spectroscopy; precipitation; tea
Department/Centre: Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Date Deposited: 27 Oct 2022 08:55
Last Modified: 27 Oct 2022 08:55
URI: https://eprints.iisc.ac.in/id/eprint/77610

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