Autosampler with control unit for performing a cleaning operation
US8770046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2010 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jun 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An autosampler is provided with a needle, a measuring pump which sucks and discharges liquid through the needle, a movement mechanism for the needle, and an injection port which has a needle sealing surface. A sample liquid is sucked into the needle and then the sample liquid discharged with the tip of the needle pressed to the needle sealing surface. When cleaning the needle sealing surface, a cleaning liquid within the injection port is sucked and then the cleaning liquid is discharged and sucked into the injection port at a position at which the tip of the needle does not make contact with the needle sealing surface. Alternatively, after the cleaning liquid is discharged into the injection port, the needle may be caused to perform an up and down motion such that the tip of the needle contacts the needle sealing surface and then is lifted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.