probeninjektor, probeninjektionsverfahren and device for liquid chromatography

摘要

PROBLEM TO BE SOLVED: To surely reduce a carrying-over in the present invention, as to a sample injection device, a sample injection method and a liquid chromatography unit capable of controlling a flow of a mobile phase using a change-over valve.;SOLUTION: This device/method/unit has a port 19 connected to a separation column 35, a pump 33 for supplying the mobile phase, a pair of sample injection needles 10A, 10B, a syringe 11, and the valve 15 for connecting the sample injection needle 10A selectively to the pump 33 or the syringe 11, and for connecting the sample injection needle 10B to the pump 33. The sample injection needle 10A is connected to the pump 33 by operating the valve 15, when the sample injection needle 10A is attached to the port 19. The sample injection needle 10A is connected to the syringe 11, and the other side sample injection needle 10B is connected to the pump 33, when the the other side sample injection needle 10B is attached to the port 19.;COPYRIGHT: (C)2006,JPO&NCIPI