SAMPLE INTRODUCTION METHOD

摘要

[PROBLEMS] To reduce carry-over. [MEANS FOR SOLVING PROBLEMS] An appropriate amount of a sample solution is sucked from a sample container by using a sample introduction device of the full injection system. Next, a solution having the same composition as a mobile phase solution is sucked through a needle (24). Then, it is put into an injection port (25). When a channel is switched so that a liquid feeder, a sample loop (23), the needle (24), the injection port (25) and a separation/analysis section are communicated together, a solution having the same composition as the mobile phase solution is employed as the solution to be pressed into the space between the injection port (25) and the needle (24). Thus, the sample oozing out from the front end of the needle (24) is prevented from being pressed into the space between the injection port (25) and the needle (24) upon switching of the channel.