大気エアロゾル化学成分連続自動分析装置（ACSA-12）とデニューダー・フィルター法による大気エアロゾル粒子の粒径別イオン成分濃度の比較

抄録

Simultaneous observations of ionic constituents for size-segregated aerosol particles were conducted at Chikushi Campus of Kyusyu University by using a Continuous Dichotomous Aerosol Chemical Speciation Analyzer (ACSA-12) and a denuder-filter (DF) method from September to December, 2014. For SO₄^2- and NO₃^-, the sum of fine (＜2.5 μm) and coarse (2.5–10 μm) mode concentrations of ACSA-12 correlated well with the DF data. Concentration of ΔH^＋ also showed a good correlation with fine mode H^＋ from the DF method but insignificant correlation for coarse mode data during the study period. Temporal and seasonal variations of fine mode WSOC concentrations from ACSA-12 were similar to that of fine mode C₂O₄^2- concentrations from the DF method. Tendency of covariation for fine mode NO₃^- concentrations was also found for fine mode WSOC or C₂O₄^2- concentrations. Further experiments for WSOC including more realistic calibration is strongly recommended for data validation of ACSA-12.