Hello,
If I have a complex reaction mixture with several ionic and molecular species, what is the best way to quantify oxalate and bicarbonate? This could be in water, and/or organic solvents like acetonitrile or DMF. I have heard of people using Ion Chromatography and was considering trying get access to one at a nearby university, but if there another way I would love to hear it!
Thanks,
Kyle
Thanks for your answer.
It will be a complex electrochemical mixture (CO2 reduction). I don't think the titration approach will be amenable to the system because it will be on very small scales and there will be catalysts and additives that could interfere with the observations.
Kyle
Idris,
Have you done this with 13C NMR? They have no protons so will not be detectable in proton NMR. 13C will take a while and I don't trust that the integrations will be accurate.
-Kyle
Kyle,
I was also going to suggest quantitative 13C NMR with a standard for oxalate and for carbonate. I only have experience trying to detect them qualitatively, but for that, we usually do 13C NMR with standards along with FTIR with standards.
I would make a calibrate curve for 13C NMR with known concentrations of the standards, then run your sample and compare the integrations.
Be careful with oxalate though because I think that can decompose into CO2 and formate. Might want to look into this.
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