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Waters

ACQUITY retention times are later than usual - WKB4707

Article number: 4707

SYMPTOMS

  • Retention time is 0.5 minutes late.
  • System pressure is slightly higher than usual.
  • For other methods, the retention times are fine.

ENVIRONMENT

  • ACQUITY H-Class
  • ACQUITY UPLC

CAUSE

Partially blocked guard column.

FIX or WORKAROUND

Replace guard column.

ADDITIONAL INFORMATION

 

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