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Optimization of Isocratic Ion Chromatography Methods for Simultaneous Inorganic Anions and Carboxylic Acids Determination

Paulina Pecyna-Utylska1, Rajmund Michalski1
1 Institute of Environmental Engineering, Polish Academy of Sciences, 34 Sklodowska-Curie St., Zabrze 41-819, Poland
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As a part of preliminary studies, the possibility of quantitative oxidation of aldehydes to carboxylic acids and their determination by isocratic ion chromatography with conductometric detection has been tested. A methodology for the simultaneous separation of inorganic anions (F-, Cl-, NO2-, Br-, NO3-, PO43-, SO42-) and carboxylic acids (formate, acetate and oxalate) by using isocratic ion chromatography with conductivity detection have been developed and validated. Six anion-exchange columns were tested. The best results were achieved for Dionex IonPac AS10 column with 50mM NaOH eluent and flow rate of 1.0 mL∙min-1.

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