A Water Indicator Strip: Instantaneous Fluorogenic Detection of Water in Organic Solvents, Drugs, and Foodstuffs

A simple, highly sensitive, and rapid colorimetric and fluorescent indicator 1 has been developed for the qualitative and quantitative determination of water. The water-induced sensitive (LOD = 0.003%, v/v) and fast (<10 s) change in emission properties was applied to the determination of water in organic solvents, drugs, and foodstuffs in both solution and practical solid-state indicator paper strips.