Technique for detecting ethylene oxide in air
US7166843B2 · kind B2 · utility
7Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Dec 19, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method can detect ethylene oxide in a sample of gas, such as air. The system includes a light source operating at a wavelength where molecules typically found within air absorb light at a substantially lower level than ethylene oxide molecules. Exemplary wavelengths are in the range of approximately 1.6–2.2 μm, and in particular at 1.6 μm, 1.645 μm, 1.692 μm, 2.195 μm, 2.2 μm, 2.216 μm, passes through the sample of gas to be detected by a detector. In one variation, the light source is a tunable diode laser or a VCSEL and the ethylene oxide level is determined using harmonic spectroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.