Separation column containing S-carboxyalkylcysteine
US5407568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Sep 9, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Deterioration of performance of a separation column for liquid chromatograph due to changes in the functional groups during the preservation or application is prevented by filling a solution containing a component in the molecule with the same structure as that of the chemical function group of a packing material for the separation column as a filling liquid together with the packing material in the separation column, and also by washing the separation column with the same filling liquid as a washing solution after the analysis and retaining the washing solution therein, whereby the preservation stability of the separation column is improved and the separation column can be preserved at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.