By Thomas on Tuesday, June 1, 2004 - 04:35 am:
I have come across a new impurity in one of our applications.
It seems to me as if it is a polymer, since I see m/z's with 44 and 54 in difference (e.g. 97-151-195-249-293 and so on)
I have other runs showing a different pattern (54-44-44-54-44 in difference).
I guess that the first pattern also could be a loss of 98?
Could there be any of you guys (or ladies) who have seen something like this (and knows what it is)?
By JLSHEN2000 on Tuesday, June 1, 2004 - 06:48 am:
44 is usually associated with polyethylene (CH2CH2
O). I don't know what 54 is.
What source do you use? LC or GC?
By Thomas on Tuesday, June 1, 2004 - 07:08 am:
I'm sorry, that I didn't state that. I'm using LC-MS (Agilent HP1100 single quad).
No, you're right. My problem is also figuring out what 54 is (or 98?).
By Anonymous on Tuesday, June 1, 2004 - 07:33 am: