In times of water content test of HFO I have seen to mix benzene with HFO first in equal mixing ratio. Is there any other compound other than benzene, which can be used instead of benzene to separate water part from the HFO?
To get out water from Hf O, you may dry it in a drying furnace at about 120 degree centigrade for for half an hour. The furnace is to to be equipped with ware absorber such as Silica gel.