Dispensing needle for a fraction collector
US10001463B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2017 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Aug 30, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Described is a dispensing needle for a fraction collector. The dispensing needle includes a conduit having a fluid channel to conduct a chromatographic flow, an interior wall that defines the fluid channel, an exterior surface and an endface through which the chromatographic flow is dispensed. The dispensing needle also includes a coating of a hydrocarbon material or a fluorocarbon material that is bonded to the endface. The coating is also bonded to at least a portion of the exterior surface that is adjacent to the endface and at least a portion of the interior wall that is adjacent to the endface. The coating operates to reduce a droplet volume of a liquid dispensed from the endface that may remain at the tip of the dispensing needle. Consequently, the concentration variation in a collected fraction due to a missing droplet or extra droplet is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.