We are designing containment filtered venting system EUF. Everything is smooth except removing CH3I. We have tried a lot of methods including using Na2S2O3(Sodium Thiosulfate).We designed a venturi tube and it was located under sodium thiosulfate solution. When CH3I goes trough the equipment,it should be romoved.But our experiment shows the effectiveness is very low.t seems not work. Can anyone tell me some information about this expriment,espercially the experiment condition?