Abstract
Combining the system of rapid collection of ambient particles and ion chromatography, the system of rapid collection of fine particles and ion chromatography (RCFP-IC) was established to automatically analyze on-line the concentrations of water-soluble ions in ambient particles. Here, the general scheme of RCFP-IC is described and its basic performance is tested. The detection limit of RCFP-IC for SO 2−4 , NO −3 , NO −2 , Cl− and F− is below 0.3 µg m−3. The collection efficiency of RCFP-IC increases rapidly with increasing sized particles. For particles larger than 300 nm, the collection efficiency approaches 100%. The precision of RCFP-IC is more than 90% over 28 repetitions. The response of RCFP-IC is very sensitive and no obvious cross-pollution is found during measurement. A comparison of RCFP-IC with an integrated filter measurement indicates that the measurement of RCFP-IC is comparable in both laboratory experiments and field observations. The results of the field experiment prove that RCFP-IC is an effective on-line monitoring system and is helpful in source apportionment and pollution episode monitoring.
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Wen, T., Wang, Y., Chang, SY. et al. On-line measurement of water-soluble ions in ambient particles. Adv. Atmos. Sci. 23, 586–592 (2006). https://doi.org/10.1007/s00376-006-0586-0
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DOI: https://doi.org/10.1007/s00376-006-0586-0