A high performance differential mobility analyzer for the masses

IF 3.9 3区环境科学与生态学 Q2 ENGINEERING, CHEMICAL

Journal of Aerosol Science Pub Date : 2024-12-30 DOI:10.1016/j.jaerosci.2024.106522

Juan Fernandez de la Mora , Jerzy Kozlovski

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引用次数: 0

Abstract

A hand-held Differential Mobility Analyzer (DMA) weighting 4 kg is developed to operate laminarly at many hundreds of L/min, while covering at unusually high resolution the 1–200 nm size range. Coupled with a small and efficient portable vacuum cleaner pump requiring no cooling, a resolving power of 10 or more is obtained at mobility diameters above 1.4 nm. The resolving power at 200 nm is between 40 and 60. Certain design compromises have been made to enable the wide adoption of this instrument in conventional aerosol measurements, making it comparable to broadly used contemporary commercial DMAs in portability, complexity, and cost. Yet, the high flow rate capability provides drastic advantages in resolution, sensitivity and size range over more conventional DMAs. This DMA is nevertheless inferior in resolution to more specialized instruments developed for studies of either nanoparticles or viruses. The inner electrode is a 1° half-angle cone accelerating mildly the flow. Critical dimensions in mm are: outer radius R₂ = 19.58; inner radius at the outlet slit R₁ = 14.34; axial distance between slits L = 85.94.

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来源期刊

Journal of Aerosol Science 环境科学-工程：化工

CiteScore

8.80

自引率

8.90%

发文量

127

审稿时长

35 days

期刊介绍： Founded in 1970, the Journal of Aerosol Science considers itself the prime vehicle for the publication of original work as well as reviews related to fundamental and applied aerosol research, as well as aerosol instrumentation. Its content is directed at scientists working in engineering disciplines, as well as physics, chemistry, and environmental sciences. The editors welcome submissions of papers describing recent experimental, numerical, and theoretical research related to the following topics: 1. Fundamental Aerosol Science. 2. Applied Aerosol Science. 3. Instrumentation & Measurement Methods.