title: A 3D printed smartphone optosensing platform for point-of-need food safety inspection.
abstract: The deficiency in rapid and in-field detection methods and portable devices that are reliable, easy-to-use, and low cost, results in the difficulties to uphold the high safety standards in China. In this study, we introduce a rapid and cost-effective smartphone-based method for point-of-need food safety inspection, which employs aptamer-conjugated AuNPs as the colorimetric indicator, and a battery-powered optosensing accessory attached to the camera of a smartphone for transmission images capture. A user-friendly and easy-to-use Android application is developed for automatic digital image processing and result reporting. Streptomycin (STR) is selected as the proof-of-concept target, and its specific quantitation can be realized with a LOD of 12.3 nM (8.97 μg kg-1) using the reported smartphone-based method. The quantitation of STR in honey, milk and tap water confirm the reliability and applicability of the reported method. The extremely high acceptance of smartphone in remote and metropolitan areas of China and ease-of-use of the reported method facilitate active food contaminant and toxicant screening, thus making the implementation of the whole food supply chain monitoring and surveillance possible and hence significantly improving the current Chinese food safety control system.
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Zhonggang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Shujia
authors.initials: S
authors.lastname: Xu
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China; Shenzhen Key Research Laboratory of Detection Technology R&D on Food Safety, Technical Centre for Food Inspection and Quarantine, Shenzhen Entry-Exit Inspection and Quarantine Bureau, Shenzhen, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Yixun
authors.initials: Y
authors.lastname: Tan
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Chenming
authors.initials: C
authors.lastname: Ma
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Song
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Lelun
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China; Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, China. Electronic address: yichq@mail.sysu.edu.cn.
authors.forename: Changqing
authors.initials: C
authors.lastname: Yi
mesh_terms: D000818:Animals; D002681:China; D003124:Colorimetry; D060766:Drinking Water / Q000032:analysis; D059022:Food Safety; D006722:Honey / Q000032:analysis; D053768:Metal Nanoparticles; D008892:Milk / Q000737:chemistry; D066330:Printing, Three-Dimensional; D015203:Reproducibility of Results; D000068997:Smartphone
chemical_list: D060766:Drinking Water
keywords: 3D printing; Gold nanoparticles; Point-of-need food safety inspection; Smartphone optosensing device; Streptomycin; Two-color ratiometric method