Post Wed Oct 25, 2017 4:00 am

Re: background contamination

Great responses above — I just want to add, we also see a constant speckle of Pb on the UCSF CyTOF, and I actually like it that way. I intentionally collect 208Pb when I’m running cells because it is a nice real-time indicator that liquid is flowing into the system. If the Pb signal stops, you have a major clog :). Same thing goes for Xenon.

Note that I’m referring to a “speckle” and not a thick streak. As others have said, a thick streak is a problem.

Glad you’ve figured it out, Chan.