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- Posts: 5
- Joined: Tue Feb 11, 2014 1:54 am
I am working in a lab with a Dionex ICS-1100 using AG & AS 22 columns in order to measure chloride and nitrate in ice samples in the 50ppb range. Our ICS has been giving us quite a bit of trouble, so I plan on posting several questions.
The first problem to come up is tailing. We got the ICS last February, and used it a couple of times and got nice, symmetric peaks with just a hint of a tail. We turned the machine off and didn't use it again until December, and then got quite a bit of tailing in our peaks. We've been running the IC several times since then, and the tailing hasn't gone away, though it has decreased a little bit. Do you have any ideas as to what could be going on? Could not using the machine for 9 months have deteriorated the peaks?
Also, I was wondering, do you consider it best practice to leave an ICS running when you are not using it for more than a few days? When do you usually turn off your ICS?
Thanks for any help you can provide.