Patent ID: 9546987
Date: 2017-01-17
CPC Classifications: G01N

Claim:
1. A liquid chromatograph comprising: a liquid-sending unit that changes a mixture ratio of a plurality of solvents composing a mobile phase; and an analysis condition setting control unit configured to set an analysis condition for a plurality of gradient analyses and to control an operation of the plurality of gradient analyses, where the mixture ratio of the plurality of solvents composing the mobile phase are temporally changed in each of the plurality of gradient analyses and a combination of the mixture ratio at a starting point and the mixture ratio at an ending point of the gradient analysis is different between the plurality of gradient analyses, the analysis condition setting control unit configured to: a) provide entry locations on a display screen for allowing a user to enter the mixture ratio at the starting point and the mixture ratio at the ending point and allowing a user to set a number of times of changing at least one of the mixture ratios at the starting point and the ending point as well as an amount of change per one operation of changing the mixture ratio at the starting point or the ending point; b) determine target values by making combinations of possible values of the mixture ratio at the starting point and possible values of the mixture ratio at the ending point based on contents of information entered by the user, and c) create a plurality of gradient profiles respectively corresponding the aforementioned combinations on the display screen; and d) control the liquid-sending unit so as to sequentially perform the plurality of gradient analyses according to the plurality of gradient profiles.