Patent ID: 6966936

Claim:
A trapping device for heating a predetermined gas-phase substance for reaction and trapping a reaction product, comprising: a tubular housing having open opposite ends; a tubular trapping body provided with an gas inlet part and a gas outlet part formed respectively at opposite ends thereof, and inserted through either of the open ends of the housing in the housing so as to be detachably contained in the housing with the gas inlet part placed at one of the open ends of the housing and the gas outlet part placed at the other open end of the housing; trapping members placed in a gas passage between the gas inlet part and the gas outlet part of the trapping body so as to be in contact with the gas-phase substance introduced through the gas inlet part into the trapping body to make the reaction product deposit thereon; and a heating means for heating the trapping members at a predetermined temperature, wherein the heating means is disposed in a space between an outer circumference of the trapping body and an inner circumference of the housing.