Nanoliter osmometer and method of operation
US7182509B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Aug 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N13/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is an apparatus for determining a temperature at which a phase change occurs in a fluid sample, a method for measuring a temperature at which a phase change occurs in a sample and a sample cell. An apparatus for determining a temperature at which a phase change occurs in a fluid sample 60′ in accordance with the invention includes a sample cell (12′)for providing direct collection of the sample from a sample source (74) which is collected and retained at a collecting end thereof by capillary attraction between the collecting end and the sample, the sample cell including a longitudinal passage (78) extending from the collecting end to a far end through which light is transmitted to provide an image of the sample as retained at the collecting end of the passage and with a cross sectional area of the passage being greater at the far end than at the collecting end; a heating and cooling assembly (14), including a temperature sensing device (44), the heating and cooling assembly holding and thermally contacting the sample cell during the determining of the temperature by the temperature measuring device at which the phase change occurs while the sample is positioned in the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.