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How to troubleshoot LC carryover (injector carryover) based on its location- WKB64313

Article number: 64313

OBJECTIVE or GOAL

Troubleshoot carryover based on its location.

ENVIRONMENT

  • Alliance HPLC system
  • 2695 Separations Module
  • 2695D Dissolution Separations Module

PROCEDURE

  • Carryover found in the needle: Extend wash time
  • Carryover found in the needle seal: Extend wash time/replace the needle seal
  • Carryover resulted from cloth: Replace the cloth
  • Carryover resulted from inappropriate needle wash: Adjust to appropriate needle wash
  • Carryover resulted from obstructed needle wash: Repair

ADDITIONAL INFORMATION

The new e2695 has improved carryover performance. You can update to the new Seal Pack if possible/necessary.

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