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Ethanolamine in sample

Posted: Sun Aug 12, 2018 7:43 am
by SamSamson
Dear Sir or madam

Can ethanolamine in sample influece determination Acetates and Formates?
I use Metrohm 930 IC flex with chemical suppresion and sample preconcentration.
I figured, when I mesure sample in Dionex IC 2500 (without preconcetrator, I use 2ml sample loop) and when I same sample mesure in Metrohm 930 IC flex so between results are big deviation.
Deviation is only between Acetates and Formates, other anions are without deviation. I provide determination in ppb range.

* Sorry for my english I´m beginner

Re: Ethanolamine in sample

Posted: Tue Aug 14, 2018 5:17 am
by Markus Laeubli, Metrohm
Dear SamSamson

I do not know any possible effect of ethanolamines to the analysis of format or acetate.
I also cannot see any reason for different results for these two ions on different IC systems.

If you send me sample and calibration determinations from MagIC Net I will have a look to the chromatograms.