A Mobile-Based High Sensitivity On-Field Organophosphorus Compounds Detecting System for IoT-Based Food Safety Tracking

A mobile-based high sensitivity absorptiometer is presented to detect organophosphorus (OP) compounds for Internet-of-Things based food safety tracking. This instrument consists of a customized sensor front-end chip, LED-based light source, low power wireless link, and coin battery, along with a sam...

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Bibliographic Details
Published in:Journal of sensors 2017-01, Vol.2017 (2017), p.1-13
Main Authors: Hong, Zhi-liang, Chiang, Patrick, Liu, Ran, Chen, Guoping, Lan, Hao, Wan, Lei, Liang, Hao, Qin, Yajie, Jin, Han, Zheng, Li-Rong
Format: Article
Language:English
Subjects:
Chip formation
Chips
Chromatography
Circuits
Design
Enzymes
Food packaging
Food safety
Internet of Things
Laboratories
Methods
Noise
Pesticides
Product safety
Pulse width
Radio frequency identification
Semiconductors
Sensitivity
Sensors
Tracking
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Summary:A mobile-based high sensitivity absorptiometer is presented to detect organophosphorus (OP) compounds for Internet-of-Things based food safety tracking. This instrument consists of a customized sensor front-end chip, LED-based light source, low power wireless link, and coin battery, along with a sample holder packaged in a recycled format. The sensor front-end integrates optical sensor, capacitive transimpedance amplifier, and a folded-reference pulse width modulator in a single chip fabricated in a 0.18 μm 1-poly 5-metal CMOS process and has input optical power dynamic range of 71 dB, sensitivity of 3.6 nW/cm2 (0.77 pA), and power consumption of 14.5 μW. Enabled by this high sensitivity sensor front-end chip, the proposed absorptiometer has a small size of 96 cm3, with features including on-field detection and wireless communication with a mobile. OP compound detection experiments of the handheld system demonstrate a limit of detection (LOD) of 0.4 μmol/L, comparable to that of a commercial spectrophotometer. Meanwhile, an android-based application (APP) is presented which makes the absorptiometer access to the Internet-of-Things (IoT).
ISSN:1687-725X
1687-7268
1687-7268
DOI:10.1155/2017/8797435