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Iron contamination

http://www.chromforum.org/viewtopic.php?t=25910

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Iron contamination

Posted: Thu Nov 13, 2014 9:18 pm
by laurimc
Hi all,
I injected a sample that (apparently) had too much iron in it and contaminated my system. I've cleaned up the column and supressor now, but I'm wondering: how much iron can I have in a sample and still be safe to inject? My samples are about 20-30ppm iron, but I want to dilute as little as possible so I can still see the anions.

FYI:
Dionex ICS-2100
AS-18 column & guard
ASRS 300 supressor
CRD-200 carbonate removal
1mL/min 12mM-52mM KOH

Ideas?

Re: Iron contamination

Posted: Wed Nov 26, 2014 2:29 pm
by H2Oh
Do you care at all about phosphate?

Re: Iron contamination

Posted: Wed Nov 26, 2014 3:09 pm
by Markus Laeubli, Metrohm
I assume that if you have that much of iron, you will not find any phosphate.

Re: Iron contamination

Posted: Mon Dec 01, 2014 5:26 pm
by laurimc
H2Oh, I really don't care about phosphate.

I've also tried using the OnGuard II H cartridge but it doesn't seem to help, so I'm stuck with minimum 50x dilution.

Anyone?

Re: Iron contamination

Posted: Wed Dec 17, 2014 2:30 pm
by DJ
SCX or else mixed bed guard?
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