Sample introduction method
US8234939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2008 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Jul 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample introduction method for reducing carry-over is provided. After a sample introduction device in a total volume injection method draws a proper amount of a sample solution from a sample container and further draws a solution with the same composition as a mobile phase solution with a needle 24, the needle 24 is inserted into an injection port 25. When flow paths are switched to communicate a liquid feeder, a sample loop 23, the needle 24, the injection port 25, and a separation/detection section, the solution with the same composition as the mobile phase solution is forced into a gap between the injection port 25 and the needle 24. Therefore, the samples squeezed out of a tip section of the needle 24 during the switching of the flow paths are prevented from being forced into the gap between the needle 24 and the injection port 25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.