| 摘要 |
PROBLEM TO BE SOLVED: To prevent a liquid from being ejected from the tip of a needle when the needle is pulled out of an injection port.SOLUTION: An auto sampler is provided with a pressure release actuation unit which, by controlling a needle drive mechanism and the operation of a switching mechanism, switches the switching mechanism before the tip of a needle is pulled out of an injection port while a sampling passage is interposed between a liquid sending device and an analytical column so that the sampling passage does not exist between the liquid sending device and the analytical column and a system including the sampling passage is left open, and stands by until the pressure inside the sampling passage returns to atmospheric pressure.SELECTED DRAWING: Figure 2 |
