Preparative liquid chromatograph

Patent metadata

Field	Value
Publication number	US-12222340-B2
Application number	US-202217676164-A
Country	US
Kind code	B2
Filing date	Feb 20, 2022
Priority date	Mar 2, 2021
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A preparative liquid chromatograph for separating and extracting components in a sample, the preparative liquid chromatograph including a separation channel ( 2 ) through which a mobile phase flows, an injector ( 6 ) that injects the sample into the mobile phase, a separation column ( 8 ) for separating components in the sample injected into the mobile phase, the separation column ( 8 ) being provided downstream of the injector ( 6 ) on the separation channel ( 2 ), a detector ( 10 ) for detecting peaks of the components separated by the separation column ( 8 ), a fraction collector ( 12 ) configured to collect an eluate from the separation column ( 8 ) into a plurality of collection containers ( 20:22 ) at a downstream of the detector ( 10 ) while fractionating the eluate, and a controller ( 14 ) for controlling operation of the fraction collector ( 12 ), wherein the fraction collector ( 12 ) is provided with peak collection containers ( 20 ) and waste liquid collection containers ( 22 ), each peak collection container ( 20 ) is used for collecting a peak portion including a collection target peak detected by the detector ( 10 ) in the eluate, and each waste liquid collection container ( 22 ) is used for collecting a waste liquid portion not including the collection target peak in the eluate, and the controller ( 14 ) is configured to collect the peak portion including the collection target peak detected by the detector ( 10 ) in the eluate in the peak collection container ( 20 ), and to collect at least a part of the waste liquid portion in the waste liquid collection container ( 22 ).

First claim

What is claimed is:

1. A preparative liquid chromatograph for separating and extracting components in a sample, the preparative liquid chromatograph comprising: a separation channel through which a mobile phase flows;
an injector that injects the sample into the mobile phase;
a separation column for separating the components in the sample injected into the mobile phase, the separation column being provided downstream of the injector on the separation channel;
a detector for detecting peaks of the components separated by the separation column;
a fraction collector configured to collect an eluate from the separation column into a plurality of collection containers at a downstream of the detector while fractionating the eluate;
wherein the fraction collector is provided with both a set of peak collection containers and a set of waste liquid collection containers, each peak collection container configured to collect a peak portion including a collection target peak detected by the detector in the eluate, and each waste liquid collection container configured to collect a waste liquid portion not including the collection target peak in the eluate;
a controller configured for controlling operation of the fraction collector;

such that the controller is configured to collect the peak portion including the collection target peak detected by the detector in the eluate in the peak collection container, and to collect at least a part of the waste liquid portion in the waste liquid collection container.

2. The preparative liquid chromatograph according to claim 1 , wherein the controller is configured to require a user to designate, on a chromatogram of the sample acquired in advance, at least one collection target peak to be collected in the peak collection container, and is configured to collect at least one peak portion each including the at least one collection target peak designated by the user in the peak collection container and to collect waste liquid portions before and after the at least one peak portion in the waste liquid collection containers.

3. The preparative liquid chromatograph according to claim 2 , wherein the controller is configured to require a user to designate an amount of each of the waste liquid portions to be collected before and after the at least one peak portion in the waste liquid collection container.

4. The preparative liquid chromatograph according to claim 1 , wherein the controller is configured to collect all of the waste liquid portion in the waste liquid collection container after separation and extraction, which is started by injecting a sample into the mobile phase, wherein sample injection is started when the separation and extraction are completed.

Assignees

• Shimadzu Corp

Inventors

• UEDA Shiori
• SHAGAWA Tomohiro
• Tamaoki Soichiro
• Yamazaki Tomoyuki
• Sato Shohei

Classifications

• G01N30/8679

  Target compound analysis, i.e. whereby a limited number of peaks is analysed · CPC title

• G01N30/466

  with separation columns in parallel · CPC title

• G01N2030/027

  Liquid chromatography · CPC title

• G01N30/16

  Injection (G01N30/24 takes precedence) · CPC title

• B01D15/247

  Fraction collectors · CPC title