Compositions useful as chromatography stationary phases
US7557232B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2007 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | May 25, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/3285
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC). The compositions include a substrate (e.g., silica gel), covalently bound to a compound, which includes both a hydrophobic moiety and a hydrophilic moiety, which is preferably a 1,2-diol moiety. The hydrophobic moiety is sufficiently hydrophobic for the compositions to exhibit reversed phase characteristics and typically incorporates at least 5 carbon atoms in sequence. Based on having both hydrophilic and hydrophobic functionalities, the new stationary phases exhibit unique chromatographic properties. For example, these media can be used in either hydrophilic (HILIC) mode, in which the mobile phase includes a high percentage of an organic solvent, or in reversed phase mode, in which the mobile phase contains a higher percentage of an aqueous solvent. The current invention also provides methods of making and using the compounds and compositions of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.