Hydrogen sulfide (H₂S), commonly known as the “rotten-egg gas,” is a toxic gas frequently found in wastewater and organic decomposition processes. Even at low concentrations, H₂S can pose risks to human health, making rapid and accessible detection methods essential for environmental monitoring.
Researchers from the Environmental Analysis Research Unit (EARU) have developed a simple method for detecting H₂S using silver nanoprisms combined with digital image analysis. In the presence of H₂S, the solution changes color, which can be quantified from photographs taken with a smartphone.
The method is simple, low-cost, and suitable for on-site environmental monitoring, with strong potential for development into portable hydrogen sulfide test kits.
- Wannida Sapyen
- Baifern Aincharoen
- Junjuda Unruangsri
- Narong Praphairaksit
- Apichat Imyim