Ghost peaks with same intensity in every injection

[Mike H.]

I was going to suggest using fresh MP bottles before the extensive troubleshooting. I've found this to be the cause of the majority of my ghost peak problems.

[Ken99]

Hi all, hope someone can kindly advise me ~

I did passivation as per what was done earlier by a member here and I have narrowed down the ghost peaks to a problematic water source.

Using other source of ultra pure water from another lab, I managed to get neat blanks without any carry over peaks.

Our lab purchased a new UPW system recently from Millipore, and to my horror, the ghost peaks re-appeared again with the same intensity in every injection.

I was thinking that the water source in my lab was contaminated; but is it even possible that can happen with a new ultra pure water system?

Looking for some kind wisdom and help here.

Thanks a lot !