A novel, simple but highly selective fluorescent probe is developed for the direct detection of sulfide ions [S2−] based on the fluorescence quenching of the functionalized CdS QDs in aqueous solution at trace levels and successfully applied for quantitation of S2− from water samples in a complex matrix exclusive of pretreatment by standard addition method.
![Graphical abstract: Direct detection of sulfide ions [S2−] in aqueous media based on fluorescence quenching of functionalized CdS QDs at trace levels: analytical applications to environmental analysis](http://hg.y866.cn/compound/lib/scimg/usr/1/C3AN36825D.jpg)
