Liquid chromatograph apparatus and liquid chromatograph analysis method
US9759694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Nov 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An analysis method is achieved in which pressure variation resulting from sample injection or passage switching by an autosampler does not exert an influence on the control of a liquid transfer pump. The liquid chromatograph analysis method comprises the steps of: transferring two or more types of eluents while changing a mixing ratio between the eluents; adjusting an amount of the transferred liquid within a predetermined time in a passage for the eluent transferred; injecting a sample in the passage; supplying to a separation column the eluent into which the sample is injected; separating a target component in the sample; and detecting the target component thus separated. In this method, control is exercised so as to synchronize a liquid transfer cycle of the eluent with the sample injecting operation and to implement the sample injecting operation at a timing rather than the pressure obtaining time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.