ANALYSIS DEVICE HAVING LIQUID CHROMATOGRAPH, AND LIQUID CHROMATOGRAPH ANALYSIS METHOD

摘要

An analysis device having a liquid chromatograph and a method for analyzing a liquid chromatograph is realized, which is capable of preventing a plurality of separation columns from reaching the end of life and preventing a plurality of streams from being unusable at the same time so as to suppress a significant decrease in throughput and the stoppage of the device.A control unit determines whether a usable stream is 0 or not among streams 1, 2, and 3, and in a case where none of the streams are usable, the control unit skips a sample introduction in the cycle. In a case where there is one usable stream in the cycle, the stream is used. In a case where there are multiple streams that are usable in the cycle, and there are multiple streams of which the remaining number of use of a separation column is the minimum, the stream having the smallest stream number is used. In a case where there is one stream of which the remaining number of use of a separation column is the minimum, the stream to which the separation column having the minimum remaining number of use is connected is used.