By Teng on Thursday, July 8, 2004 - 08:42 am:
I need help on trouble shooting peak area reproducibilty. My GC/MS is a Shimadzu GC-17A
model GCMS-QP5000. I'm having problem with peak reproducibilty. Any help?
By Mark on Thursday, July 8, 2004 - 11:53 am:
Teng,
More details might be helpful, i.e. are you using an autoinjector, what kind of injection (split, splitless, ???) detector (FID, MSD, other).
Regards,
Mark
By teng on Friday, July 9, 2004 - 09:11 am:
Mark,
I'm using an autoinjector. The injection is split, and I using a MSD detector. Any help?
By Mark on Monday, July 12, 2004 - 10:57 am:
Teng,
I should have asked what the RSD values are, typically the RSDs when using a MSD seem to be higher than when using an FID for example. Other concerns might be using too volatile a solvent with too high of an initial column temp., not waiting for the injector to stabilize if you are using a gas saver feature on the GC before injecting the sample. Just some quick thoughts,
Regards,
Mark