Dual-Function Fluorescent Probe for Detection of Hydrogen Sulfide and Water Content in Dimethyl Sulfoxide.

To detect hydrogen sulfide (HS) and water content in dimethyl sulfoxide, the fluorescent probe (Probe ) was used, as it not only detects HS but also detects the water content. After HS was added into Probe , the intensity of fluorescence increased and was up to 1300 times. In case the HS concentration was in the range 0-20 μM, it was able to be detected by Probe , and the limit of detection was 0.851 nM. When Probe and HS underwent a reaction, the solution color had some changes. These colors changed in terms of the concentration changes of HS, ranging from colorless to yellow. The Probe test paper only needed to be exposed to hydrogen sulfide gas for 20 s for the color change to occur. Besides, Probe -HS was used to detect water content in dimethyl sulfoxide which ranged from 0 to 100%. The color change of the solution was opposite to that of HS, ranging from yellow to colorless.