Publication: Detection of Na<inf>2</inf>S<inf>2</inf>O<inf>4</inf> bleaching agent contaminated in bean sprout using an electronic nose
Issued Date
2020-01-01
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2-s2.0-85084067211
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Mahidol University
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SCOPUS
Bibliographic Citation
KST 2020 - 2020 12th International Conference on Knowledge and Smart Technology. (2020), 135-138
Suggested Citation
Pawin Sirisinha, Jessada Pakotiprapha, Karyn Viseshakul, Panigarn Katekaew, Teerakiat Kerdcharoen, Tanthip Eamsa-Ard Detection of Na<inf>2</inf>S<inf>2</inf>O<inf>4</inf> bleaching agent contaminated in bean sprout using an electronic nose. KST 2020 - 2020 12th International Conference on Knowledge and Smart Technology. (2020), 135-138. doi:10.1109/KST48564.2020.9059375 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/56162
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Title
Detection of Na<inf>2</inf>S<inf>2</inf>O<inf>4</inf> bleaching agent contaminated in bean sprout using an electronic nose
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Abstract
© 2020 IEEE. Sodium hydrosulfite (Na2S2O4) is widely considered as the most common bleaching agent for bean sprouts. However, this chemical is harmful to human health, especially to the digestive system and metabolism. The present work aims to develop an efficient and ecologically-friendly method for the detection of sodium hydrosulfite using an electronic nose based on metal oxide semiconductor gas sensors. An array of different eight gas sensors was used to measure sodium hydrosulfite volatile as present in the bleached sprouts. The signals from gas sensors were collected and analyzed using the Principal Component Analysis (PCA) via a monitoring computer. From the PCA, the volatility data can be clearly distinguished into two groups: (i) bleached and (ii) non-bleached as divided by the PC1 axis. Moreover, PC1 is capable of generating a calibration curve for quantitative analysis. Our method is demonstrated to be an effective performance for detecting sodium hydrosulfite with the sensitivity as low as 0.01 g/L.