Liquid chromatography methods and devices
US4457846A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Jul 8, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/121
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the analysis of substances by liquid chromatography, samples to be analyzed are introduced into the chromatography column by being loaded into a fluid permeable section in a cartridge, placing the sample loaded section over the inlet end of the column and flowing solvent through such section into the column. The cartridge may be a plate with an opening through it with the ends of the opening covered by permeable membranes or the opening may be packed with porous material. The cartridge may have a plurality of such openings and these may be in the form of a line on a rectangular plate or a circle on a circular plate. The new methods and devices of the invention are particularly useful in micro-scale liquid chromatographic procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.