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- Joined: Mon Sep 10, 2012 2:32 pm
The needle wash consists of 30% ACN in water. The seal wash is 10% IPA in water. I don't expect that one of those solvents gives a peak with that much retention. What could be causing this peak?
Discussions about HPLC, CE, TLC, SFC, and other "liquid phase" separation techniques.
artsjeroen wrote:
The peak is still giving trouble. It is visible in both ECD and UV methods. I have rinsed the complete system with magic mix (MeOH/ACN/IPA/UPW 25/25/25/25) to no avail. The peak does not decrease in size after multiple injections, and it is present when injecting 0 µl. I've changed the needle wash and seal wash multiple times with fresh solvents. But nothing seems to solve this problem.
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