Preparative liquid chromatograph

Abstract

A separation column (), an injector () that injects a sample into a mobile phase flowing through a flow path () leading to the separation column (), at least one detector () that is fluidly connected downstream of the separation column (), and generates a plurality of detector signals different from each other derived from a component in a sample separated by the separation column (), a fraction collector () for fractionating and collecting a portion containing a component separated by the separation column () in an eluate from the separation column () into an individual collection container, and a controller () that detects a component peak in a plurality of chromatograms based on each of a plurality of the detector signals and controls operation of the fraction collector () based on a result of the detection are included. The controller () includes a fractionating collection part () configured to execute fractionating collection in which a portion detected as a component peak only in one chromatogram of a plurality of the chromatograms and a portion detected as a component peak in all of a plurality of the chromatograms are collected separately in collection containers different from each other.