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- Posts: 221
- Joined: Thu Mar 03, 2011 8:05 pm
- Location: New Hampshire, USA
ant78se wrote:Don Shelly wrote:
It's best to choose a highly volatile solvent. The solvent needs to "flash" in the injection port and also precede your analytes through the column so as not to interfere with the resolution of your analytes. That's why I recommended DCM. Essential oils should be miscible in DCM and DCM is very volatile and less likely to be retained by your stationary phase.
I agree with Peter that 10 meters is a very short column if you are looking for resolution of all of your components.
Do you know the stationary phase of the column?
Hi Don,
Now i've got my GC delivered. It has 2 FID's and two columns (cat no. 6172 25m 0,25mm 0,2um) but one coulmn is broken about 10cm from the connection to FID.
Now i'm wondering if i should buy a longer column or it has to be the same type and length?
Cheers!!
/Alvin
I wouldn't worry about 10 cm. It is very insignificant compared to 25 meters. According to the catalog, this column has a max temperature of 225 degrees. Please don't exceed this. As Peter suggests, use only 1 column until you become proficient. Avoid allowing air to enter the column. When you attach it to your carrier gas, allow plenty of purge time to remove oxygen prior to ramping the oven.
I have never use a cyanopropyl phase for this type of work. Please keep us posted.
LGC Standards