Chemstation integration over wide time areas
Posted: Fri Aug 20, 2010 12:32 am
I’m trying to set up a method for the quantification of Diesel fuel, using an FID, over a timed range (c10-c24) using MSD Chemstation D.01. I have made a compound that extracts signal from the time of my alkane carbon markers (3.00 min to 9.480 min). The data system does a good job with the starts and stops for collecting the signal but where it applies the horizontal baseline seems to vary a lot. Sometimes the integrator skims along the top and sometimes it draws all the way down to the bottom of the Qedit window, this results in huge quanitation differences. When I go to draw a manual baseline in Qedit the window does not let me zoom out so it is difficult to know where to apply the right height for the baseline, i.e. I can’t see the whole chromatogram’s natural baseline so it is hard to follow it along. So my questions are:
1. Does anyone know how to set up MS Chemstation to reliably and consistently apply a baseline over a large timed range?
2. Does anyone know how to zoom out or scroll the x-axis in Qedit? It is easy to zoom out when looking at MS data (left click), but in GC data it is static.
Thanks in Advance
1. Does anyone know how to set up MS Chemstation to reliably and consistently apply a baseline over a large timed range?
2. Does anyone know how to zoom out or scroll the x-axis in Qedit? It is easy to zoom out when looking at MS data (left click), but in GC data it is static.
Thanks in Advance