Title:
METHOD FOR CONTROLLING LIQUID CHROMATOGRAPH
Document Type and Number:
WIPO Patent Application WO/2023/106033
Kind Code:
A1
Abstract:
Provided is a method for controlling a liquid chromatograph, with which it is possible to determine whether bubbles remain in a flow path. This method for controlling a liquid chromatograph (300) comprising a liquid feed pump, a flow path connected to the liquid feed pump, a flow-path switching valve (auto purge valve (205), injection valve (207), stream selection valve (304)) which is provided in the flow path to switch between a plurality of connection destinations of the flow path, a pressure sensor for detecting at least one pressure among a liquid feed pressure of the liquid feed pump, a flow path internal pressure in the flow path, and a pressure acting on the flow-path switching valve, includes: rotating the flow-path switching valve during the liquid feed from the liquid feed pump; and determining whether bubbles remain in the flow path on the basis of a pressure variation when the pressure, which has dropped as a result of the rotation of the flow-path switching valve, rises.
Inventors:
NOGAMI MAKOTO (JP)
HARADA YUSHI (JP)
HARADA YUSHI (JP)
Application Number:
PCT/JP2022/041993
Publication Date:
June 15, 2023
Filing Date:
November 10, 2022
Export Citation:
Assignee:
HITACHI HIGH TECH CORP (JP)
International Classes:
G01N30/02; G01N30/26; G01N30/32; G01N30/86
Domestic Patent References:
| WO2020183684A1 | 2020-09-17 |
Foreign References:
| JP2015021931A | 2015-02-02 | |||
| JP2004507639A | 2004-03-11 | |||
| US20160327514A1 | 2016-11-10 | |||
| JP2000130353A | 2000-05-12 | |||
| JPH01182579A | 1989-07-20 | |||
| JPS63106382A | 1988-05-11 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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