Method and apparatus for the application of volatile substances conveyed in carrier gas

摘要

The invention relates to a method and apparatus for treating a material particularly foodstuffs, pharmaceutical compositions etc. The method comprises placing a material to be treated in a vessel capable of evacuation, evacuating the vessel and contacting the material with a volatile substance entrained in a carrier gas. Preferably the volatile substance is a natural food acid such as acetic or carbonic and the carrier gas is nitrogen or carbon dioxide.