Department of Environmental Health, Harvard School of Public Health, 401 Park Drive, Landmark Center West, Boston, MA 02215, USA.
Inhal Toxicol. 2011 Nov;23(13):853-62. doi: 10.3109/08958378.2011.619590.
Diffusion denuders have been commonly used to remove trace gases from an aerosol (mixture of gases and particles), while allowing the particles to remain suspended in air. We present the design and evaluation of a high-flow (16.7 L min⁻¹) countercurrent parallel-plate membrane diffusion denuder that has high removal efficiencies for both non-reactive gases such as carbon monoxide (89%), as well as volatile organic compounds (80-85%) from an automobile exhaust. Particle losses were approximately 15% for particles around 100 nm in diameter. This denuder is suitable for toxicological tests involving both human and animal exposures to combustion aerosols. The denuder may also be used for other applications, for example, to reduce the effect of gas-phase sampling artifacts on particle composition.
扩散除气器常用于从气溶胶（气体和颗粒的混合物）中去除痕量气体，同时使颗粒悬浮在空气中。我们提出了一种高通量（16.7 L min⁻¹）逆流平行板膜扩散除气器的设计和评估，该除气器对一氧化碳等非反应性气体（89%）以及挥发性有机化合物（80-85%）具有高去除效率从汽车尾气中去除。对于直径约为 100nm 的颗粒，颗粒损失约为 15%。该除气器适用于涉及人类和动物暴露于燃烧气溶胶的毒理学测试。该除气器也可用于其他应用，例如减少气相采样artifact 对颗粒成分的影响。
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