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one adduct explanation

http://www.chromforum.org/viewtopic.php?t=12520

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one adduct explanation

Posted: Wed Mar 17, 2010 9:39 pm
by jiang295
why I often see [M-1]+16 adduct in MS negative mode?
mobile phase methanol and water

Posted: Fri Mar 19, 2010 1:54 am
by Don_Hilton
Whant kind of molecule? Details of the samples and chromatography?

Posted: Fri Mar 19, 2010 2:30 am
by jiang295
just paraben standards in esi negative mode.
Qtof micromass.
Whant kind of molecule? Details of the samples and chromatography?
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