Construction of a Novel Fluorescent Probe for On-site Measuring Hydrogen Sulfide Levels in Food Samples

Hydrogen sulfide (H 2 S) has been involved in many foodstuffs and beverages. On-site measuring the H 2 S level in food samples was beneficial to the concerns about food safety and food quality. Herein, we rationally constructed a novel fluorescent probe to track the H 2 S levels in various food samples. The optical experiments indicated that the probe displayed highly selective and sensitive response to H 2 S. In addition, the probe can function well in a wide pH value condition, providing a reliable platform to sense H 2 S. The practical application demonstrated that the probe was applied for tracking H 2 S levels in banana, grape, and vinegar for the first time. Importantly, by fabricating test strips, the probe was first served to monitor the released H 2 S in raw meat without relying on elaborate instrumentation. Thus, the probe could be employed as a simple tool to measure the H 2 S levels in various food samples, as well as to monitor the fresh-like quality of raw meat under on-site conditions.