Does Filtration Efficiency Affect Measurements of Particle Chemical Composition?

A direct method to measure filtration efficiency was developed and used for the determination of the efficiency of a Nuclepore filter. This needs two equivalent filtration systems operated in sequence. The amount of particulate matter collected on each system is measured and introduced in a simple f...

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Bibliographic Details
Published in:Journal of environmental engineering (New York, N.Y.) N.Y.), 1998-07, Vol.124 (7), p.669-671
Main Author: Romo-Kröger, Carlos M
Format: Article
Language:English
Subjects:
Aerosols
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
TECHNICAL NOTES
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Summary:A direct method to measure filtration efficiency was developed and used for the determination of the efficiency of a Nuclepore filter. This needs two equivalent filtration systems operated in sequence. The amount of particulate matter collected on each system is measured and introduced in a simple formula. The particulate masses deposited on the filters in each system were measured as total mass, by balance gravimetry, and as individual elemental masses, by PIXE (particle induced X-ray emission). With this very general method it was possible to determine the efficiencies of a 0.4 m Nuclepore filter operated with a stacked filter unit for particles less than 2.5 m in total mass and elemental masses. The experiment showed that the efficiency of this filter is very poor for some specific elements, like sulfur, that are concentrated in very small particles.
ISSN:0733-9372
1943-7870
DOI:10.1061/(ASCE)0733-9372(1998)124:7(669)