On-site Portable Detection of Gaseous Methyl Iodide Using an Electrochemical Method.

We report an electrochemical device for portable on-site detection of gaseous CH3I based on PVIm-F for the first time. The device achieves detection of gaseous CH3I with a significant selectivity and a low detection limit (0.474 ppb) in 20 min at 50 degrees C and 50% relative humidity, which is of great significance for achieving real-time on-site monitoring of radioactive hazardous environments. An electrochemical device for portable on-site detection of gaseous CH3I based on the poly(1-vinylimidazole) film (PVIm-F) was reported with a significant selectivity and a low detection limit.