SAMPLE INJECTION APPARATUS FOR GAS CHROMATOGRAPHY

PROBLEM TO BE SOLVED: To wash the interior of a transfer pipe without contaminating a sample evaporation chamber. SOLUTION: A changeover valve 14 changing over the connection of a sample soln. pipe 10 and a washing soln. pipe 11 to a transfer pipe 15 is provided and a funnel 23 is provided between an injector 18 and a sample evaporation chamber 21 so as to be made movable by a funnel driving mechanism 24. After a sample is supplied to the transfer pipe 15 from the sample soln. pipe 10 to be held therein, the injector 18 is allowed to fall and a liquid sending pump 12 is driven to send a washing soln. into the transfer pipe 15. The sample is injected into the sample evaporation chamber 21 by the pressure of the washing soln. Thereafter, the injector 18 is drawn up and the funnel 23 is moved under the injector 18 and the washing soln. is sent out. By this constitution, the interior of the transfer pipe 15 is washed with the washing soln.