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Waters

Carryover and needle wash not being used with SM-FTN PLUS - WKB75078

Article number: 75078

SYMPTOMS

  • Carryover observed in run.
  • No needle wash used during run.
  • When priming the needle wash, no liquid exiting the waste tube and could not hear the solenoid valve.

ENVIRONMENT

ACQUITY UPLC Sample Manager - Flow Through Needle PLUS (SM-FTN PLUS)

CAUSE

Air gap in the wash line due to the U-bend created inside the SM-FTN to the solenoid valve.

FIX or WORKAROUND

  1. Open the side panel for the SM-FTN and remove the tygon tubing for the wash line.
  2. Pull through the solvent using a syringe.
  3. Prime the wash to ensure that it is being pulled through and cleaning the needle.

ADDITIONAL INFORMATION

 

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