High sensitivity fluorescent probe based on aminated cellulose for detecting SO2 derivatives and its application in food analysis

Sulfur dioxide (SO 2 ) derivatives are toxic at high concentrations and may cause various health problems. Therefore, the development of green, biodegradable, and portable fluorescent probes is of great significance. In this study, a novel fluorescent probe (AM) was designed and synthesized using aminated cellulose as a carrier and coumarin derivatives as fluorescent groups for efficient detection of SO 2 derivatives. Compared with traditional probes, probe AM utilizes renewable biomass materials that are environmentally friendly and biodegradable, and exhibits excellent fluorescence performance. The structure of the probe AM was confirmed by SEM, XRD, FTIR, and 1 H NMR, and the optical properties of the product were studied. The probe demonstrates a rapid response (150 s), a low detection limit (1.43 μM), and high selectivity. For practical applications, AM-based test strips were fabricated, enabling rapid visual detection of SO 2 derivatives. Additionally, the probe can be applied for quantitative analysis in sugar samples. It is worth noting that composite films based on additive manufacturing are superior to commercial PE (polyethylene) films in fruit preservation. • A novel aminated cellulose based fluorescent probe AM has been prepared. • The probe responds quickly (150 s), with a detection limit as low as 1.43 μM. • The probe can also be used for quantitative analysis of SO 2 derivatives in sugar samples. • Fluorescent composite film based on AM has excellent performance in fruit preservation.