PURPOSE: To realize a high-resolution device useful for analyzing a polar compound by providing a gas discharge port discharging the gas to the outside at a preset flow quantity at the end section near the connector of a gas guide pipe.
CONSTITUTION: In a device constituted of an inert gas feed source 5, a constant- temperature oven 2 storing a capillary 1, and a gas guide pipe 3 having a connector 4 at one end and connected to the inert gas feed source 5 at the other end, the inert gas is fed to the capillary 1, and the needle valve 8 of a gas discharge pipe 7 provided at the end section near the connector 4 of the gas guide pipe 3 is adjusted to discharge a preset quantity of the inert gas to the outside. The oxygen in the air left in the gas guide pipe 3 before the capillary 1 is connected is discharged to the outside together with the inert gas, the effect of the high-temperature treatment for fixing the liquid phase is prevented, and a high-resolution capillary column for gas chromatography can be manufactured.
TOKUNAGA TOSHIHIDE
OSUGA KAZUSHI
NARISHIMA KOICHI
NAGAI HISAAKI
HITACHI NAKA SEIKI KK