A Step Towards Miniaturized Milk Adulteration Detection System: Smartphone-Based Accurate pH Sensing Using Electrospun Halochromic Nanofibers

Tripathy, Suryasnata and Reddy, Manne Shanmukh and Vanjari, Siva Rama Krishna and Jana, Soumya and Singh, Shiv Govind (2018) A Step Towards Miniaturized Milk Adulteration Detection System: Smartphone-Based Accurate pH Sensing Using Electrospun Halochromic Nanofibers. Food Analytical Methods. pp. 1-13. ISSN 1936-9751

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Abstract

Development of an economical miniaturized platform for monitoring inherent biophysical properties of milk is imperative for tamper-proof milk adulteration detection. Towards this, herein, we demonstrate synthesis and evaluation of a paper-based scalable pH sensor derived from electrospun halochromic nanofibers. The sensor manifests into three unique color-signatures corresponding to pure (6.6 ≤ pH ≤ 6.9), acidic (pH < 6.6), and basic (pH > 6.9) milk samples, enabling a colorimetric detection mechanism. In a practical prototype, color transitions on the sensor strips are captured using smartphone camera and subsequently assigned to one of the three pH ranges using an image-based classifier. Specifically, we implemented three well-known machine learning algorithms and compared their classification performances. For a standard training-to-test ratio of 80:20, support vector machines achieved nearly perfect classification with average accuracy of 99.71%.

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IITH Creators:
IITH CreatorsORCiD
Vanjari, Siva Rama KrishnaUNSPECIFIED
Jana, SoumyaUNSPECIFIED
Singh, Shiv Govindhttp://orcid.org/0000-0001-7319-879X
Item Type: Article
Uncontrolled Keywords: pH sensor, Nanofibers, Milk adulteration detection, Electrospinning, Support vector machines, Monte Carlo cross validation
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 13 Nov 2018 10:23
Last Modified: 13 Nov 2018 10:23
URI: http://raiithold.iith.ac.in/id/eprint/4531
Publisher URL: http://doi.org/10.1007/s12161-018-1391-y
OA policy: http://www.sherpa.ac.uk/romeo/issn/1936-9751/
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