Cold trapping apparatus for infrared transmission analysis including a method and substrate therefor
US5045703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1988 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Mar 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/8417
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sample collection device and method for cold trapping individual gas bands from a gas source that may include a chromatographic separation and for spectrographically analyzing the individual gas bands. The device includes a vacuum chamber containing a rotatably supported highly thermally conductive transmissive substrate having a highly thermally conductive support axle and at least one transmissive surface for holding a sample deposited thereon. A gas inlet is provided for depositing a mixture of sample and matrix material on the transmissive surface which is maintained at a sufficiently low temperature to cause solidification of the gas. A first set of optical elements directs an incident beam of electromagnetic analytical radiation from a source onto the solidified deposit, while a second set of optical elements directs the portion of incident beam transmitted through the deposit and substrate to a detector that is sensitive to the spectral wavelengths being investigated. A highly thermally conductive flexible strap is connected between the support axle and a cold head of a cryogenic refrigerator for transferring heat from the substrate. The strap is of sufficient length a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.