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Integration with Chemstation question
Posted: Mon Mar 19, 2012 12:41 pm
by richardturner
My first post so I shall try not to sound dumb.
I have been using the timed integration events to sum peak areas and produce total areas from TPH curves in carbon banded RT windows. I want to subtract the surrogate peak from the total C15-C28 band. Is there a smart was to do this?
Re: Integration with Chemstation question
Posted: Mon Mar 19, 2012 2:18 pm
by Bigbear
It can be done. As I remember there is a TPH method in the software you can get hints from.
Re: Integration with Chemstation question
Posted: Mon Mar 19, 2012 3:07 pm
by GasMan
I was playing around with this problem a few months ago, and I seem to remember that if you treated the peak that you do not wish to include in the summed group as a calibrated peak, then it's area is not included in the summation group area.
Gasman
Re: Integration with Chemstation question
Posted: Wed Mar 21, 2012 8:06 pm
by Yama001
If this is not the GC/LC chemstation (meaning you have Eviroquant or something similar, I am never sure which folks have), a peak type of "H" will integrate from the start to the end of the time range. Any peaks with an "I" or "S" (internal/surrogate) type will be automatically subtracted if they elute with the H peak's time range.