LIQUID CHROMATOGRAPH AND LIQUID CHROMATOGRAPH CONTROL METHOD

It is possible to provide a liquid chromatography graph that can supply a mobile phase to a storage bottle and can prevent mixing of air bubbles into a flow path without stopping analysis and liquid feeding. A liquid chromatograph 100 includes a liquid feeding device 104 that feeds out a mobile phase, a sample injection portion 105 that injects a sample into the mobile phase fed out from the liquid feeding device 104, a column 106 that separates the sample carried by the mobile phase fed out from the sample injection portion 105, and a detection device 108 that detects the sample separated by the separation column 106. The liquid chromatograph 100 further includes a storage bottle 102 that stores the mobile phase fed by the liquid feeding device 104, a mobile phase supply bottle 101 that supplies the mobile phase to the storage bottle 102, a mobile phase supply pump 103 that supplies the mobile phase stored in the mobile phase supply bottle 101 to the storage bottle 102, and a control unit 111 that controls an operation of the mobile phase supply pump 103 and determines an amount of the mobile phase to be supplied from the mobile phase supply bottle 101 to the storage bottle 102.