with an aqueous medium in the presence of a reducing agent such as sodium thiosulfate, ammonium hydroxide, or potassium iodide; prevents formation of oxyfluoride (OF2); controls greenhouse gas pollutionUS20020029613 *10 Sep 200114 Mar 2002Sensor Tek, LlcGas sensorUS20020051132 *2 Apr 20012 May 2002Hiromoto OhnoMeasuring method for concentration of halogen and fluorine compound, measuring equipment