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Understanding Operating Principles
Exploring injection principles
The autosampler has three injection modes:
•
Full loop– For maximum injection volume precision
•
Partial loop needle overfill – For maximum flexibility
•
Partial loop – For zero sample loss
Defining pressure-assisted sample aspiration
For all injection modes, the instrument method can enable loop injection with
pressure-assisted sample aspiration. This option pairs an on-board
compressor with intelligent valve switching and highly accurate syringe
control, resulting in these benefits:
•
Helps aspirate viscous samples
•
Reduces the risk of bubbles in the sample line
•
Prevents unwanted sample movement in the needle
Pressurizing vial
Buffer tubing
HPLC pump
Sample loop
HPLC column
Air pressure
Syringe
