Biomass-based indole derived composited with cotton cellulose fiber integrated as sensitive fluorescence platform for NH3 detection and monitoring of seafood spoilage

Herein, an indole-derived water-soluble fluorescence nanomaterial and biomass-based cellulose filter paper integrated as solid-state fluorescence platform (H2-FP) for seafood spoilage detection was prepared. H2 exhibits high fluorescence stability and good biocompatibility with green beans, onion tissues, blood and zebrafish, which proving that H2 has a wide range of application scenarios. Further, H2-FP with effective, solid-state fluorescence, portable, and reusable characteristics is nanoengineered for NH3 quantitative and qualitative detection (DOL = 2.6 ppm). Then, H2-FP has been successfully used to monitor NH3 release in the seafood spoilage process at various storage time (4 ? and 25 ?). More importantly, fluorescence color of H2-FP is integrated smartphone are converted to digital values through RGB channels and successfully used to visualize semi-quantitative recognition of NH3. This sensing fluorescence platform integrated with smartphone furnishes an effective fabrication strategy and broad prospects for explore various biomass-based materials for sensing NH3 change in biological and environmental samples.

Automated summary

In this study, an indole-derived water-soluble fluorescence nanomaterial and biomass-based cellulose filter paper were integrated as a solid-state fluorescence platform for seafood spoilage detection. The platform exhibited high fluorescence stability and good biocompatibility and could be applied in various scenarios. By converting the fluorescence color to digital values through a smartphone, semi-quantitative detection of NH3 was achieved. This sensing fluorescence platform integrated with a smartphone provides a new fabrication strategy for exploring biomass-based materials for sensing NH3 change in biological and environmental samples.