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Posted: Thu Jan 08, 2009 3:23 pm
by yangz00g
Sindu,
with all due respect, there are about 800 pesticides worldwide,and many of them are not LC/MS amenable, I am wondering how ABI found 1000 to analyze. If you can, please share with the original document.
Is that the Cliquid and Japanese list one? 300 pesticides is the most I have seen from ABI'a application notes.
To be fair, I am a user of ABI machine.
BTW, MRM3? or your mean MS3?
Posted: Thu Jan 08, 2009 7:10 pm
by cy2008
i believe that used Scheduled (Timed) SRM/MRM which is a bonus pt but not in one complete run.
[quote="sindhu"]ABI has introduced MRM3 in thier 5500 Trap system when compared with other vendors like Thermo,Agilent and Waters and I strongly beleive this is an added advantage while you are doing pesticide quantitation.
And being of user of Agilent , waters and ABI I can say that we are very happy with ABI's performance in our lab and our comfortable level is high with their system.
Why dont you look at thier new application note wherein you can analyze 1000 pestcides in a single run!.
The limited mass range is not an issue of the system as I never saw any pesticide crossing 1000 da and when you use for peptides also it is not going be an issue as it gives multiple charged species.By using deconvolution software you can break them into singly charged species and can identify.
Please check with waters sales person that why did they use sulfadimethoxine for determining MRM sensitivity instead of regular reserpine.[/quote]
Pesticides
Posted: Thu Jan 08, 2009 7:21 pm
by cy2008
so i know there are some that wont fragment on a triple. So we do a SIM on the system.
Does anyone have a 6460 or ab's cliquid and think that it is easier to use then say waters or thermo's?
scan time
Posted: Wed Feb 18, 2009 2:27 am
by Steph5217
Scan time 0,001 s ? sure ?
Re: scan time
Posted: Wed Feb 18, 2009 6:34 am
by cy2008
[quote="Steph5217"]Scan time 0,001 s ? sure ?[/quote]
yes Thermo's system run at 1ms compared to competitors at 5ms