A ratiometric fluorescent probe for the rapid and specific detection of HSO 3 - in water samples.

Hydrosulphite (HSO ₃ ^- ), as a common and important chemical reagent, is widely used in everyday life, however excessive use and abuse of HSO ₃ ^- can cause potential harmful effects on the environment and in biological health. In this paper, we describe the design and preparation of a colorimetric and ratiometric fluorescence probe for the visual detection of HSO ₃ ^- (excitation wavelengths were, respectively, 336 nm and 520 nm). This method showed some advantages including simple preparation, high selectivity, fast response, and significant colour and fluorescence ratio (F ₄₅₀ /F ₅₉₄ ) changes in the presence of HSO ₃ ^- . In addition, this probe was used successfully for the detection of HSO ₃ ^- in real water samples and showed a good recovery rate range.
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