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Waters

ACQUITY QSM Shifting Retention Times during Isocratic Run - WKB61678

Article number: 61678

SYMPTOMS

  • Retention time shift observed when mixing A:B solvents.
  • No shift observed when using premix at 100% A or 100% C.
  • No leaking observed.
  • No significant pressure issues or changes.

ENVIRONMENT

  • ACQUITY UPLC H-Class Quaternary Solvent Manager (QSM)

CAUSE

Failing GPV

FIX or WORKAROUND

Replace GPV

  • Gradient Proportioning Valve, Dual Channel - p/n 700005161

Dual Channel GPV.JPG

ADDITIONAL INFORMATION

This part can only be replaced by a Certified Waters Engineer.  Please contact your local Field Service Specialist for part ordering and to schedule service. 

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