Liquid chromatograph
US6485642B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Jun 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample solution is sent into a concentration column through a three-way joint and a three-way switching valve to trap and concentrate the sample components on the concentration column, followed by injecting the sample solution into an injector by operating a first dilution solvent pump. When a large volume of the sample solution is to be sent or when the sample solution has a high solvent strength, trapping and concentration on the concentration column may be facilitated by replacing the sample solvent with a second dilution solvent by allowing the second dilution solvent to flow into the three-way joint after setting the flow rate of the second dilution solvent from a second dilution solvent vessel to a prescribed flow rate using a second dilution solvent pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.