Patent ID: 7135111

Claim:
A separation analyzer comprising: a first pump for transferring liquid, while changing mixing ratios of plural kinds of solutions; a second pump for transferring a transfer solution; a sample introduction section; a separation column for separating a sample; and a detector for detecting the sample eluted from the separation column, wherein there is disposed a flow switching means having first and second sampling loops for temporarily storing the solutions and comprising a flow passage from the first pump, a flow passage from the second pump and a flow passage from the sample introduction section, the flow passages being connected with each other, and wherein the flow switching means alternatively assumes a first state where the second pump pushes out the solution in the second sample loop towards the sample introduction section, while transferring the solution from the first pump to the first sampling loop, and assumes a second state where the second pump pushes out the solution in the first sampling loop, towards the sample introduction section while transferring the solution from the first pump to the second sampling loop.