Inlet apparatus for gas-aerosol sampling
AssigneeThe United States of America as represented by the Administrator of the Environmental Protection Agency
InventorsRobert K. Stevens, Charles Stone
Life of this patent
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Abstract
An inlet apparatus for gas-aerosol sampling comprises an elutriator column and an impactor member. The elutriator column comprises an inlet and an impact accelerator jet outlet, and the inner surface of the column is provided with a coating of polytetrafluoroethylene-containing polymer. The impactor member includes a housing which surrounds the impact accelerator jet outlet and an impactor surface arranged within the housing and opposite the impact accelerator jet outlet. The inner surface of the housing is also provided with a polytetrafluoroethylene-containing polymer coating.
Claims12
A gas-aerosol sampling system, comprising
- (a) an inlet comprising an elutriator column having an inlet at one end for admitting a gas-aerosol sample and an impact accelerator jet outlet at the other end opposite said one end, the inner surface of said elutriator column being provided with a coating of polytetrafluoroethylene-containing polymer and an impactor member connected with said elutriator column at the other end of said column, said impactor member including
- (i) a housing surrounding the impact accelerator jet outlet, the inner surface of said housing being provided with a coating of polytetrafluoroethylene-containing polymer, and
- (ii) an impactor surface arranged within the housing and opposite the impact accelerator jet outlet, the impact accelerator jet outlet delivering the gas-aerosol sample to said impactor surface to achieve separation of large size particles from said gas-aerosol sample;
- and
- (b) a filter member connected with the impacted member housing, wherein the gas-aerosol sample from which the larger size particles have been removed is passed from the housing to the filter member for collection of the fine particles.
A gas-aerosol sampling system, comprising
- (a) an inlet comprising an elutriator column having an inlet at one end for admitting a gas-aerosol sample and an impact accelerator jet outlet at the other end opposite said one end, the inner surface of said elutriator column being provided with a coating of polytetrafluororethylene-containing polymer and an impactor member connected with said elutriator column at the other end of said column, said impactor member including
- (i) a housing surrounding the impact accelerator jet outlet, the inner surface of said housing being provided with a coating of polytetrafluoroethylene-containing polymer, and
- (ii) an impactor surface arranged within the housing and opposite the impact accelerator jet outlet, the impact accelerator jet outlet delivering the gas-aerosol sample to said impactor surface to achieve separation of larger size particles from said gas-aerosol sample;
- (b) at least one denuder connected with the impactor member housing, wherein the gas-aerosol sample from which the larger size particles have been removed is passed from the housing to the denuder;
- and
- (c) a filter member connected with the denuder, wherein the gas-aerosol sample passes from the denuder to the filter member.
Dependencies are inferred from the claim text.