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2.2 Operating Principle and Functional Description
(d)
Wash of the needle outer wall with the wash fluid1
The syringe aspirates one-half of the air volume (:va/2)
while needle is moving to the rinse port.
Deliver the wash fluid1 via the wash pump to wash the
needle outer wall.
vd: Dead volume (the instrument inside parameter)
vi: Injection volume (the sample net volume to the flow path)
vw: Waste volume (the air volume of the lead and rear part of a sample)
va: Air volume (the air volume which sample is sandwiched.)
Figure 2-38 Rinsing the Needle Outer Wall
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