Re: Contaminating Polymer in MALDI Spectra

From: Markus Piotrowski (Markus.Piotrowski@ruhr-uni-bochum.de)
Date: Sat Mar 17 2001 - 05:53:52 EST

Hi Wiliam,

using ESI-Q-TOF I once saw a doubly charged polymer with a repeat of 22
in the range from 500 to 700, which was very likely PVP (PVP-40),
because this was a digest from a nitrocellulose blot (stained with
Ponceau-S) blocked with PVP. Considering that you have single charged
ions this would make repeats of 44.

Hope this helps,

Markus

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