Gard EE, Kleeman MJ, Gross DS, Hughes LS, Allen JO, Morrical BD, Fergenson DP, Dienes T, Johnson RJ, Cass GR, Prather KA
E. E. Gard, D. S. Gross, B. D. Morrical, D. P. Fergenson, T. Dienes, M. E. Galli, K. A. Prather, Department of Chemistry, University of California, Riverside, CA 92521, USA. M. J. Kleeman, L. S. Hughes, J. O. Allen, R. J. Johnson, G. R. Cass, Departme.
Science. 1998 Feb 20;279(5354):1184-7. doi: 10.1126/science.279.5354.1184.
The heterogeneous replacement of chloride by nitrate in individual sea-salt particles was monitored continuously over time in the troposphere with the use of aerosol time-of-flight mass spectrometry. Modeling calculations show that the observed chloride displacement process is consistent with a heterogeneous chemical reaction between sea-salt particles and gas-phase nitric acid, leading to sodium nitrate production in the particle phase accompanied by liberation of gaseous HCl from the particles. Such single-particle measurements, combined with a single-particle model, make it possible to monitor and explain heterogeneous gas/particle chemistry as it occurs in the atmosphere.
利用气溶胶飞行时间质谱，在对流层中随着时间的推移持续监测单个海盐颗粒中氯离子被硝酸根非均相替代的情况。模型计算表明，观测到的氯离子置换过程与海盐颗粒和气相硝酸之间的非均相化学反应一致，导致在颗粒相中生成硝酸钠，同时从颗粒中释放出气态氯化氢。这种单颗粒测量与单颗粒模型相结合，使得监测和解释大气中发生的非均相气体/颗粒化学反应成为可能。
