Hi everyone

My samples contain both organics (acetate and formate) and inorganics (Chloride, sulfate, sulfite, carbonate, thiosulfate, etc.)

I've been using AS18 column (Dionex IonPac AS18 (4*250mm) with a P/N of 060549) so far but it does not give a good separation for neither acetate/formate nor sulfite/sulfate although I lowered the eluent concentration to 1mM.

Do you think is there any better column suiting my samples that can gives us a better separation and maintain the high accuracy for inorganics? Based on my research, AS11-HC seems to be a good option but I wanted to consult here before purchasing a new column.

Thanks