Sample injection valve for high-performance liquid chromatography (HPLC) devices
US6874354B2 · kind B2 · utility
25Cited by
7References
2Claims
0Family size
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Key dates
| Filing date | Nov 12, 2001 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Apr 9, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86743
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The sample injection valve for high-performance liquid chromatography (HPLC) devices comprises a stator with inlets for the sample and the mobile phase, outlets leading to the chromatography column and to a waste collector, as well as connections for both ends of a sample loop. Its rotor has the customary connection channels. An additional washing liquid inlet (7) opens into the connecting channel (9) that, in one valve position, connects the sample inlet (1) to the outlet (2) leading to the waste collector. This enables the sample inlet and the pipette or syringe located therein to be rinsed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.