| 摘要 |
In combination, liquid injection apparatus comprising a tubular plastic member, e.g., Teflon, through the internal tubular opening of which the forward end of a reciprocable plunger, adapted for receipt of a specimen, can be extended into contact with, and for receipt of, a liquid to be sampled. Upon withdrawal of the forward end of the plunger through the tubular opening, with which the plunger surface is in wiping contact, a measured quantity of the liquid specimen is transmitted therethrough for storage or for injection, while unmeasured liquid is wiped off of, and removed from, the surface of the plunger. In preferred embodiments, the forward end of the reciprocable plunger itself is recessed or provided with an internal capillary opening of measured capacity for containing the measured liquid specimen, and in another a longitudinal slot, or slots, located within the internal opening of the tubular plastic member leaves an accurately measured, or measurable, streak of liquid on the surface of the plunger for storage or injection.
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