Passive column pre-heater with sample band spreading reduction feature
US8956534B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Nov 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/3046
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a chromatographic system and method which includes a passive pre-heater assembly. In the inventive system and method a fluid mixture is supplied from an injector to the pre-heater assembly and then to a chromatographic column having an active heating source. The pre-heater assembly includes a convoluted tube with first and second ends and a fluid passage extending centrally therebetween, first and second end fittings attached respectively to the first and second ends of the convoluted tube, and a thermally conductive film attached to an outer surface of the convoluted tube. The first end fitting is adapted for fluidly connecting the first end of the convoluted tube to the injector and the second end fitting is adapted for fluidly connecting the second end of the convoluted tube to the chromatographic column. The thermally conductive film conveys heat from an active heating source of a chromatographic column to the convoluted tube when the pre-heater assembly is positioned adjacent to the active heating source. The central fluid passage in the convoluted tube has a series of bends which function to create a secondary fluid flow field that is substantially orthogonal to …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.