Simultaneous determination of inorganic anions and metal ions by suppressed ion chromatography Original Research Article

In this work the simultaneous determination of environmentally interesting inorganic anions (BrO−3, SeO2−3, SeO2−4, HAsO2−4, WO2−4, MoO2−4, CrO2−4) and metal ions (Pb2+, Cd2+, Ni2+, Cu2+) precomplexed by EDTA by suppressed ion chromatography has been optimized. Throughout the work, a latex-based strong anion-exchange resin and carbonate buffer as eluent have been used. The study was performed in presence of anions that commonly occur in real samples (Cl−, NO−3, SO2−4). Separation has been optimized studying the main eluent parameters that influence analyte retention, that is carbonate concentration and pH.