Claims
- 1. A filter for analyzing gas comprising:
a polycarbonate membrane having a pore size of about 2 micrometers or less, secured to a support.
- 2. A filter for analyzing gas comprising:
a supported polycarbonate membrane having a pore size of about 2 micrometers or less, wherein the support comprises an annular support.
- 3. A filter for analyzing gas comprising:
a polycarbonate membrane having a pore size of about 1 micrometer or less; and a support secured to the membrane.
- 4. A filter for analyzing gas comprising:
a polycarbonate membrane having a pore size of about 1 micrometer or less; and an integral support.
- 5. The filter of any one of claims 1-4, wherein the support comprises a polymeric material.
- 6. The filter of any one of claims 1-4, wherein the support comprises a polyolefin.
- 7. The filter of any one of claims 1-4, wherein the support comprises polymethylpentene.
- 8. The filter of any preceding claim, wherein the support is thermally bonded to the membrane.
- 9. The filter of any of claims 3-8, wherein the support comprises a ring.
- 10. A device for analyzing gas comprising:
a housing having at least one inlet and at least one outlet and defining a gas flow path between the inlet and the outlet; a filter disposed in the housing across the gas flow path, wherein the filter comprises the filter of any preceding claim.
- 11. A method for analyzing gas comprising:
passing gas including particulate matter through a filter comprising a supported polycarbonate membrane having a pore size of about 2 micrometers or less; and determining the particulate matter collected by the filter.
- 12. A non-gravimetric method for analyzing gas comprising:
passing gas including particulate matter through a filter comprising an integrally supported polycarbonate membrane having a pore size of about 1 micrometers or less: and determining the particulate matter collected by the filter.
- 13. A method for analyzing gas comprising:
passing gas including particulate matter through a filter comprising an integrally supported polycarbonate membrane having a pore size of about 1 micrometers or less: and determining the particulate matter collected by the filter.
- 14. The method of any preceding claim, wherein the method of analysis comprises X-Ray luminescence.
- 15. The method of any preceding claim, including analyzing gas passed from an incinerator.
- 16. The method of claims 11 or 13 wherein determining the particulate matter collected by the filter includes computing the total mass of particulate matter collected divided by the actual volume of air sampled, over a specified sampling period.
- 17. The method of claim 16 wherein the mass concentration of the particles is computed and expressed in micrograms per cubic unit of air.
Parent Case Info
[0001] This application claims the benefit of U.S. provisional patent application No. 60/176,023, filed Jan. 14, 2000, which is incorporated by reference.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/US01/00879 |
1/12/2001 |
WO |
|