Consumption of HS from Our Daily Diet: Determination by a Simple Chemosensing Method.

A unique method has been developed for comparative analysis of HS produced from food samples from our daily diet, both qualitatively and quantitatively. The selective detection of HS has been executed by introducing a simple chemodosimeter ( ) that gives response on the basis of intramolecular charge transfer. UV-vis, fluorimetric, and NMR titrations were performed to demonstrate the sensing mechanism and electronic environment of in the presence of HS. Density functional theory calculations were performed to validate the mechanism of azide ( ) reduction to amine ( ) by the strong reducing power of HS. The potentiality of this chemosensing method is that it could be treated as a simple, less-time-consuming, and cost-effective method for determining HS in biological samples in the nanomolar range.