IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0470752
(2006-09-07)
|
등록번호 |
US-7552620
(2009-07-09)
|
발명자
/ 주소 |
- DeRoos, Fred L.
- Mueller, Mark E.
- Roehrig, Mark A.
|
출원인 / 주소 |
- 3M Innovative Properties Company
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
19 인용 특허 :
23 |
초록
▼
Fluid permeation testing involves filling a first cavity of a test cell with a test fluid and filling a second cavity of the test cell with a challenge fluid. The challenge fluid comprises at least one analyte useful for testing permeation of the challenge fluid through a test film that separates th
Fluid permeation testing involves filling a first cavity of a test cell with a test fluid and filling a second cavity of the test cell with a challenge fluid. The challenge fluid comprises at least one analyte useful for testing permeation of the challenge fluid through a test film that separates the first and second cavities. Samples of the test fluid in the first cavity are introduced to a mass spectrometer, such as in a pulsed manner, without substantially changing the total pressure in first cavity. Samples of the test fluid in the first cavity may be introduced to the mass spectrometer while maintaining substantially balanced total pressures in the first and second cavities.
대표청구항
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What is claimed is: 1. A permeation testing method, comprising: filling a first cavity of a test cell with a test fluid; filling a second cavity of the test cell with a challenge fluid, the challenge fluid comprising at least one analyte useful for testing permeation of the challenge fluid through
What is claimed is: 1. A permeation testing method, comprising: filling a first cavity of a test cell with a test fluid; filling a second cavity of the test cell with a challenge fluid, the challenge fluid comprising at least one analyte useful for testing permeation of the challenge fluid through a test film separating the first and second cavities; after said filling of said cavities, preventing further introduction of the test and challenge fluids to the first and second cavities, respectively; introducing samples of the test fluid from the first cavity to a mass spectrometer in a pulsed manner while maintaining substantially balanced total pressures in the first and second cavities; and detecting presence of the analyte indicative of challenge fluid permeation through the test film using the mass spectrometer. 2. The method of claim 1, wherein a volume of each sample pulsedly introduced to the mass spectrometer is less than about 10 microliters. 3. The method of claim 1, wherein the total pressures in the first and second cavities differ from one another by no greater than 10 percent. 4. The method of claim 1, comprising determining a rate of permeation of the challenge fluid through the test film using data produced by the mass spectrometer. 5. The method of claim 1, wherein detecting presence of the analyte comprising using a selected ion monitoring technique to detect presence of the analyte. 6. The method of claim 1, wherein the total pressure in each of the first and second cavities is atmospheric pressure. 7. The method of claim 1, wherein the testing method is performed at ambient temperature. 8. The method of claim 1, wherein filling the first and second cavities comprises concurrent pressure-balanced filling of the first and second cavities with the test and challenge fluids, respectively. 9. The method of claim 1, wherein the test and challenge fluids are gases. 10. The method of claim 1, wherein the challenge fluids are liquids. 11. The method of claim 1, wherein the analyte detected using the mass spectrometer comprises an isotope of an element of the challenge fluid. 12. The method of claim 1, wherein the test film comprises an ultra-low permeability film. 13. The method of claim 1, wherein the challenge fluid comprises a plurality of analytes, the method comprising detecting presence of each of the plurality of analytes using the mass spectrometer. 14. The method of claim 13, wherein the plurality of analytes are detected sequentially or concurrently by the mass spectrometer. 15. The method of claim 1, wherein the method is performed for each of a plurality of test cells and a single mass spectrometer. 16. The method of claim 15, wherein the challenge fluids associated with each of the test cells comprise the same or different analyte. 17. A permeation testing method, comprising: filling a first cavity of a test cell with a test fluid; filling a second cavity of the test cell with a challenge fluid, the challenge fluid comprising at least one analyte useful for testing permeation of the challenge fluid through a test film separating the first and second cavities; after said filling of said cavities, preventing further introduction of the test and challenge fluids to the first and second cavities, respectively; introducing samples of the test fluid from the first cavity to a mass spectrometer in a pulsed manner without substantially changing a total pressure in the first cavity; and detecting presence of the analyte indicative of challenge fluid permeation through the test film using the mass spectrometer. 18. The method of claim 17, wherein a volume of each sample pulsedly introduced to the mass spectrometer is less than about 10 microliters. 19. The method of claim 17, wherein the total pressure in the first cavity differs from the total pressure in the second cavity. 20. The method of claim 17, wherein the total pressures in the first and second cavities are substantially balanced. 21. The method of claim 17, comprising determining a rate of permeation of the challenge fluid through the test film using data produced by the mass spectrometer. 22. The method of claim 17, wherein detecting presence of the analyte comprising using a selected ion monitoring technique to detect presence of the analyte. 23. The method of claim 17, wherein the test and challenge fluids are gases. 24. The method of claim 17, wherein the challenge fluids are liquids. 25. The method of claim 17, wherein the analyte detected using the mass spectrometer comprises an isotope of an element of the challenge fluid. 26. The method of claim 17, wherein the test film comprises an ultra-low permeability film. 27. The method of claim 17, wherein the challenge fluid comprises a plurality of analytes, the method comprising detecting presence of each of the plurality of analytes using the mass spectrometer. 28. The method of claim 27, wherein the plurality of analytes are detected sequentially or concurrently by the mass spectrometer. 29. The method of claim 17, wherein the method is performed for each of a plurality of test cells and a single mass spectrometer. 30. The method of claim 29, wherein the challenge fluids associated with each of the test cells comprise the same or different analyte.
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