ACQUITY H-Class QSM retention time shift - WKB22815

SYMPTOMS

• Retention time shift

• Dynamic Leak Test fails when end point is inject pod outlet

• Strange pressure profiles across gradient

ENVIRONMENT

• ACQUITY UPLC H-Class QSM

• ACQUITY UPLC H-Class QSM Bio

CAUSE

Restriction in mixer and/or tubing from Vent valve to mixer

FIX or WORKAROUND

1. Exchange mixer

ADDITIONAL INFORMATION

Part number 700005177   ASSY, MIXER, 100UL, QSM (Default)

Part number 205000731   ASSY, MIXER, 22UL, QSM

Part Number 205000719  ASSY, MIXER, 250UL, QSM

Part Number 700005258  ASSY, MIXER, 100UL, bioQSM