Liquid chromatography and apparatus for the same
US4070284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Apr 5, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/8881
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A definite, but large amount of a sample solution is fed to a small concentration column filled with a packing material to retain in the concentration column components to be measured in the sample solution. Then, a small amount of a desorbing solution is fed to the concentration column to desorb the components retained in the concentration column. The effluent solution containing the desorbed components is fed to a separation column filled with a packing material. An eluting solution is fed to the separation column to separate the components from one another, and the components are detected by a detector. Since the components are separated from one another after their concentrations have been elevated, and thus the components can be measured with a high sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.