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Positive corona glow discharge was studied in a system with cylindrical geometry in air and air-carbon dioxide mixtures at normal temperature and pressure (NTP). A spatially resolved spectroscopy technique was used in an attempt to explain the previously observed anomalous charging of particles traveling through the glow region. The results corroborate the existence of the previously reported anomaly. The apparatus developed for taking the spatially resolved spectra and the methods employed may be of interest in fundamental studies of corona discharge behavior in a practical electrostatic precipitator system.