【作者】 温天雪； 王跃思； 刘广仁； 张文； R.J.WEBER； S.BELL； BAO’ANWANG； Y.L.M；

【Author】 Wen tianxue Wang yuesi Li guangren(State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric chemistry. Institute of Atmospheric Physics. Chinese Academy of Science, beijin. 100029)R. J. Weber (Department of Earth and Atmospheric Sciences Georgia Institute of Technology)

【机构】 中国科学院大气物理研究所大气边界层和大气化学国家重点实验室； SCHOOL OF EARTH AND ATMOSPHERIC SCIENCES CEORCIA INSTIUTE OF TECHNOLOCY；

【摘要】 本文介绍了大气细粒子快速捕集及其化学成分在线分析方法。该方法在粒子捕集过程中摒弃了常用的采样器,利用增长粒子的惯性撞击到收集液中,再将样液直接输送到离子色谱或总有机碳分析仪在线分析粒子的化学成分,是完全无膜的采样系统,克服了有膜采样固有的缺点,实现了化学成分的在线分析。离子色谱和总有机碳分析仪可在6分钟内分析完一个样品,时间分辨率高。离子色谱最低检测限约为0.05μgm^-3（NH₄）到0.18μgm(SO₄^2-,不确定度为8％,TOC的检测极限为0.05ngCm^-3,不确定度接近7％。亚特兰大和休斯敦郊区的试验结果表明该方法是快速分析大气细粒子化学成分有用的工具。更多还原

【Abstract】 We report on a new approach for rapid collection of fine particles and online analytic of fine particles" chemical composition. Abandoning the general mpactor. the approach is based on fine particle collection instrument in which the droplets impinge onto a flat vertical glass plate by inertia and are collected in water. The resulting liquid is analyzed by a dual channel ion chromatograph (IC) or TOC. The approach is a free-of-film. rapid, automated on-line and continuous measurement, conquering the limitation of general collection. Only 6 minutes it takes to measure a sample by IC or TOC. The detection limit of IC is 0.05 ugm-3 (NH4-) to 0.18 ugm-3 (SO42-) and measurement uncertainties is 8% for inorganic ion. the TOC 0.05ngCm-3 and 7%. Results obtained in Atlanta and Houston Park show that the approach is a very useful tool for rapid analytic of atmospheric fine particle chemical composition.更多还原