Adding very small amounts of liquid to gas stream for analysis comprises using dosing system to wet surface with liquid and passing gas stream over surface to evaporate it

摘要

Adding very small amounts of liquid to a gas stream comprises using a dosing system to wet a surface with the liquid. The gas stream is then passed over the surface and evaporates it. An independent claim is included for an apparatus for carrying out the above process, comprising a dosing unit (3) which adds the liquid to a rotating drum (4) mounted in a housing (1) between the unit and the gas stream.