Deep learning-assisted smartphone-based portable and visual ratiometric fluorescence device integrated intelligent gel label for agro-food freshness detection. (1st July 2023)

• Record Type: Journal Article
• Authors: Lu, Zhiwei; Li, Mengjiao; Chen, Maoting; Wang, Qirui; Wu, Chun; Sun, Mengmeng; Su, Gehong; Wang, Xianxiang; Wang, Yanying; Zhou, Xinguang; Ye, Jianshan; Liu, Tao; Rao, Hanbing
• Is Part Of: Food chemistry. Volume 413(2023)
• Publication Date: 2023-07-01
• Subjects: Smartphone -- Smart fluorescent tab -- Freshness -- Spermine -- Histamine; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2023.135640
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Deep learning-assisted smartphone optical sensing platform based on CDs@Fe-Zr-MOF smart label detects SP and HIS, and meat freshness. Highlights: Two-color and dual-emitter ratio fluorescence nanoprobe for agro-food was constructed. Portable, visual, and real-time optical device with gel label was fabricated. Deep learning-assisted self-designed smartphone WeChat mini program for real-time sensing. CDs coupled with Fe/Zr-MOF acts as the response units. Abstract: Here, a smartphone-assisted dual-color ratiometric fluorescence smart gel label-based visual sensing platform was constructed for real-time evaluation of the freshness of agro-food based on the biogenic amines responses. Green-emission fluorescence carbon dots (CDs) coupled with blue-emission fluorescence bimetallic metal–organic framework (Fe/Zr-MOF) obtained dual-color CDs@Fe/Zr-MOF fluorescence nanoprobe acts as the response units. With the increase of SP and HIS content, the green fluorescence of CDs was enhanced, while the blue fluorescence of Fe/Zr-MOF was quenched. Therefore, this dual-color probe achieved a clear fluorescence color response to biogenic amines. The nanoprobe possessed sensitive and color-responsive with the LODs of 0.17 μM for SP and 2.95 μM for HIS in a wide range of 0–937.5 µM, respectively. Besides, these fluorescent nanoprobes were immobilized on the hydrogel carrier, and the intelligent fluorescent hydrogel tag can be obtained after freeze-drying, which realizes the real-time qualitative monitoring of SP and HIS in pork and shrimp samples.