What is the role of the ACQUITY UPLC H-Class needle wash mechanism, purge solvent, and seal wash solvent? - WKB193172

ENVIRONMENT

• ACQUITY UPLC H-Class
• ACQUITY UPLC H-Class PLUS

ANSWER

■ Needle wash mechanism
The figure on the left below shows the sample aspiration, and the figure on the right shows the sample injection.
For H-Class, the needle sticks into the injection port upon injection, and the needle wash solution flows from bottom to top inside the injection port to clean the outside of the needle.
Since the mobile phase is always flowing inside the needle, it has a cleaning effect.

■ Purge solvent
Auxiliary solvent for sample aspiration.
It fills the inside of the sample syringe and does not flow to the column direction.
The ② Purge solvent in the figure below.

■ Seal wash solvent
Cleans the plunger seal of the pump.

ADDITIONAL INFORMATION