| 摘要 |
PURPOSE:To enable analysis of a dilute sample by changing over heating control and the flow of a carrier gas for a sample evaporating chamber, removing the solvent occupying the greater part in a sample solvent and introducing only the intended component into a capillary column. CONSTITUTION:A sample soln. is dropped through a septum 5 onto silica wool 6 in a sample evaporating chamber. The temp. in this state is set at about the temp. at which only the solvent in the sample soln. can evaporate. Stop valves 1, 3 are closed and a stop valve 2 is opened so that the carrier gas passes through a pressure regulator 8 and the valve 2 then through the inside of an inside cylinder 7 and is released to the outside through the valve 1. The solvent having high volatility in the sample soln. is therefore evaporated and is discharged through a discharging part 22 to the outside of the system. The valves 1, 2 are then closed and the valve 3 is opened to reverse the flow direction of the carrier gas in the cylinder 7; at the same time, a heater 8 is energized to heat quickly the sample evaporating chamber 18 and to evaporate the intended component remaining in the wool 6. The component is fed into a capillary column 6 and is detected suitably with a detector 10. |
