Determination of dicarboxylic acids in atmospheric aerosols using continuous aerosol sampler with on-line connected ion chromatography system

摘要

The aim of the presented study was to use a recently developed CGU-ACTJU-IC system for on-line determination of dicarboxylic acids (DCAs) in aerosols over short time periods involving aerosol sampling into deionized water using a Condensation Growth Unit - Aerosol Counterflow Two-Jets Unit (CGU-ACTJU) sampler, quantitative preconcentration of analytes and determination by ion chromatography (IC). The parameters of automated online preconcentration method, using two parallel preconcentration columns and piston pump, were optimized. Limits of detection of studied DCAs, i.e., oxalic, malonic, succinic, glutaric/adipic, pimelic, azelaic and maleic acid, were determined to 0.27, 0.92, 1.74, 0.82, 1.17, 1.41 and 0.48 ng m(-3), respectively.