FAST GC With AGILENT 6890
Posted: Wed Sep 29, 2004 8:09 am
Does anyone do fast gc with narrow bore column and 6890?
Does anyone do fast gc with narrow bore column and 6890?
Chromatography Forum
Chromatography Forum is a public discussion group where you can post questions, news, or messages of interest to chromatographers everywhere, but you must be registered to participate (registration is FREE). If you are a registered user, please log in.
http://www.chromforum.org/
FAST GC With AGILENT 6890
Page 1 of 1
Does anyone do fast gc with narrow bore column and 6890?
fast gc and 6890
Posted: Wed Sep 29, 2004 12:45 pm
Yes
Is that all you want to knw?
Is that all you want to knw?
Posted: Wed Sep 29, 2004 1:00 pm
NoWhat type of analysis?
Does it work well,or need a lot of maintenance?
Is that easy to implement?
Thanks
Posted: Fri Oct 15, 2004 7:40 am
Hi xxx,
What type of analysis?
Does it work well,or need a lot of maintenance?
Is that easy to implement?
Thanks
U need to buy a special insert for the GC oven (it will decrease half of your oven volume) and you only can used back injector and back detector. if you used FID, set the detector to 200 Hz.
Please choose the column with the thick film stationary phase.
Use Hydrogen as your carrier gas.
Fast GC works well, easy and no need maintenance.
regards
Adi
fast GC
Posted: Fri Oct 15, 2004 9:01 am
Thank you Adi
Dear XXX,
If you are injecting CLEAN particulateless samples that will be true. But there is NO FREE LUNCH.
If you have samples at concentrations high enough to measure well (remember the sample capacity of the narrow bore columns is greatly reduced over that of even the 025mm ID columns) and the matrix does not have non-volatiles that might form a particle in the injection port and become lodged in the column partially or completely blocking the flow, you should be ok.
Also XXX remember hydrogen is required as a carrier and can be a bit tricky setting up a good optimal flow rate if you change temperatures a lot. Read the literature.
Also remember if time is the issue a shortened 0.25mm column, even down to less than 10m in length might be a better easier solution to try first, and not to mention the CHEAPER solution.
(And I work for a company that sells capillary columns..... what am I saying.....
)
But if your application is suitable go with what works best for you.
Chromatographer1
Dear XXX,
If you are injecting CLEAN particulateless samples that will be true. But there is NO FREE LUNCH.
If you have samples at concentrations high enough to measure well (remember the sample capacity of the narrow bore columns is greatly reduced over that of even the 025mm ID columns) and the matrix does not have non-volatiles that might form a particle in the injection port and become lodged in the column partially or completely blocking the flow, you should be ok.
Also XXX remember hydrogen is required as a carrier and can be a bit tricky setting up a good optimal flow rate if you change temperatures a lot. Read the literature.
Also remember if time is the issue a shortened 0.25mm column, even down to less than 10m in length might be a better easier solution to try first, and not to mention the CHEAPER solution.
(And I work for a company that sells capillary columns..... what am I saying.....
)But if your application is suitable go with what works best for you.
Chromatographer1
Posted: Fri Oct 15, 2004 11:02 am
Thank youBut do i need the oven insert with a 220/230V 6890 ?
FAST GC With AGILENT 6890
Posted: Mon Oct 18, 2004 7:06 am
We have tested the ability of the 6890 for fast gc applications. Without the pillow inside the oven, the ability of the oven to track a fast heating ramp is poor. It improves with the pillow, but then there is so much additional material inside the oven which means that cooling and equilibration is slow. I suppose the intrument will work fine with reasonably (<20deg C) slow ramps.