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Inverted Signal on GC/qMS (Shimadzu)

http://www.chromforum.org/viewtopic.php?t=27805

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Inverted Signal on GC/qMS (Shimadzu)

Posted: Wed Dec 09, 2015 11:54 am
by Ericachemistry
Hello all,

I'd like to ask for suggestions regarding a problem we had since yesterday. Our Shimadzu GC-qMS chromatograms show inverted signal (peaks up side down). Has anyone seen it before?
Thanks a lot,

Érica
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