| 摘要 |
A plunger seats in the outlet end of a cavity formed in an injector housing. The plunger is moveable within the cavity between seated engagement with the outlet end and a position which permits fluid to flow out the outlet end. The cavity is sealed to withstand pressures on the order of 2000 bar. A groove formed in the wall of the plunger or in the wall of the cavity receives liquid sample from a sample feed line which is formed in the body of the housing and terminates adjacent the groove when the plunger is seated in the outlet end of the cavity. A source of mobile phase fluid is connected to the upper end of the cavity by an inlet line. By external displacement means, the plunger is moved out of seated engagement within said cavity to permit a jet stream of mobile phase fluid to sweep the sample from the sample groove out through the outlet end of the cavity and onto a chromatographic column connected to the injector housing.
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