CONTINUOUS AUTOMATED MEASUREMENT OF THE SOLUBLE FRACTION OF ATMOSPHERIC PARTICULATE MATTER
CONTINUOUS AUTOMATED MEASUREMENT OF THE SOLUBLE FRACTION OF ATMOSPHERIC PARTICULATE MATTER
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DOI：
10.1021/ac00097a012
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发表时间：
1995-01-01
影响因子：
7.4
通讯作者：
DASGUPTA, PK
中科院分区：
文献类型：
--
作者：
SIMON, PK;DASGUPTA, PK
介绍了一种定量收集亚微米级气溶胶颗粒的新方法，描述了连续操作系统的设计和构造，利用过饱和蒸汽的冷凝将颗粒连续转移到液流中，以促进颗粒生长，然后依靠撞击和热泳效应进行收集。该自动化系统构造和操作简单，即使在 10 L/min 的流速下也能定量收集气溶胶特殊物质。气溶胶颗粒和可溶性气体的单独测量是通过将系统与湿壁平行板扩散扩散器相结合来实现的，连接到廉价的离子色谱仪进行下游分析，整个系统对颗粒硫酸盐、亚硝酸盐和硝酸盐的检测限分别为 2.2、0.6 和 5.1 ng/m(3)，对于 8 分钟的样品。该系统已用于气体和颗粒成分的现场测量；提出了结果。
A new approach is introduced for the quantitative collection of aerosol particles to submicrometer size, The design and construction of a continuously operating system is described, Particles are continuously transferred to a liquid stream utilizing condensation of supersaturated vapor to promote particle growth followed by collection that relies on impaction and the thermophoretic effect. The automated system is simple to construct and operate and provides quantitative collection of aerosol particular matter even at a flow rate of 10 L/min. Individual measurements of aerosol particles and soluble gases are achieved by combining the system with a wetted wall parallel plate diffusion denuder, Interfaced to an inexpensive ion chromatograph for downstream analysis, the detection limits of the overall system for particulate sulfate, nitrite, and nitrate are 2.2, 0.6, and 5.1 ng/m(3), respectively, for a 8 min sample. The system has been used for the field measurement of gaseous and particulate components; results are presented.