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Title: Formalin Adulteration Detection in Food Using Enose based on Nanocomposite Gas Sensors
Authors: Teerakiat Kerdcharoen
Keywords: formaldehyde;VOCs;chemiresistive gas sensors;e-nose;formalin treatment detection
Issue Date: 2019
Publisher: IEEE
Citation: Thazin Y, Eamsa-Ard T, Pobkrut T, Kerdcharoen T*. Formalin adulteration detection in food using e-nose based on nanocomposite gas sensors. 2019 IEEE International Conference on Consumer Electronics - Asia (ICCE-Asia); 2019 Jun 12-14; Bangkok, Thailand. IEEE; 2019. p. 64-67.
Abstract: The aim of this work is to develop an electronic nose (enose) system for the detection of toxic formaldehyde as a response to illegal addition of formalin into foods in the markets and food processing industries. In this work, nanocomposites of ophenylenediamine (OPD) with different functionalized singlewalled carbon nanotubes (f-SWCNTs) were used as gas sensing materials. The gas sensors have been tested to perceive the individual response to different volatile organic compounds (VOCs). Since they showed the highest response to formaldehyde which is the main component in formalin solution, the gas sensor array is appropriate for the detection of food contamination due to formalin. By setting up two conditions, namely non-treatment and formalin treatment to raw chicken, shrimp and tofu, as well as shrimps with different concentrations of formalin treatment, the odor associated with those conditions was investigated by enose. Discrimination and analysis of non-treatment (natural) and formalin contaminated samples were analyzed by the principal component analysis (PCA). Our findings support the integration of nanocomposite gas sensors into e-nose as an advantageous tool for food safety applications.
ISBN: 978-1-7281-3336-2
Appears in Collections:Physics: International Proceedings

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