About XP and axygen buffer Maldi analysis

[xiaozhe]

HI, i had used Maldi mass to detect two types of beads buffer, the one is XP beads, and the other is Axygen buffer. Here is the result:




the results are very close, we known the buffer main contain PEG8000, but accord the result we find the other higher peak. we guess may be is PEG2000.
Everyone could give me some suggestion? THX