丝网法测量纳米级气溶胶颗粒粒径分布的方法研究

Measurement of the Size Distribution of Nano-Sized Aerosols with the Wire-Screen Method

  • 摘要:
    目的 探讨纳米级气溶胶颗粒粒径分布测量的新方法。

    方法 根据丝网采集气溶胶的基本原理,建立利用丝网组合测量纳米级气溶胶颗粒粒径分布的方法,并通过比对试验和现场测量验证该方法的可行性。

    结果 经比对实验,结果表明两种不同方法的测量结果基本吻合;现场测量结果表明,室内气溶胶颗粒物的中位值和粒径分布因环境条件变化而有波动。

    结论 本研究建立的测量方法可用于测量粒径10~300 nm气溶胶颗粒物的粒径分布。

     

    Abstract:
    Objective To develop a simplified method for measuring the size distribution of nano-sized aerosols.

    Methods Based on the fundamental principles of aerosol capture on wire screens, a method adopting wire screens was developed for measuring the size distribution of nano-sized aerosols, its feasibility was verified through comparison experiments and field application.

    Results Comparison of the results showed that the measured size distribution of aerosols were nearly the same with the two methods. Field measurements also showed that both the median size and its distribution of indoor aerosols varied with the changes of environmental factors.

    Conclusion The new measuring method could be used for measurement of the size distributions of aerosols in a range of 10 nm to 300 nm.

     

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