Dichotomous Samplers Modified for Use with Electron Microscopy
Authors:
Open Access
- 1 January 1990
- journal article
- research article
- Published by Taylor & Francis in Aerosol Science and Technology
- Vol. 13 (2) , 241-248
Abstract
Large sulfate artifacts up to 2 μm in diameter were observed by scanning electron microscopy for the fine particle fraction collected in dichotomous samplers. The artifacts were attributed to small liquid particles that piled up on the filter, coalesced, and later dried as larger particles. Such artifacts were eliminated when particles were collected in a modified dichotomous sampler in which 80% to 90% of the airflow was diverted from the fine fraction filter. This airflow diversion technique was used successfully with both virtual-impactor and tandem-filter types of dichotomous samplers.Keywords
This publication has 9 references indexed in Scilit:
- Use of electron microscopy data in receptor models for PM-10Atmospheric Environment (1967), 1989
- Fly ash concentrations in philadelphia aerosol determined by electron microscopyWater, Air, & Soil Pollution, 1988
- A composite receptor method applied to Philadelphia aerosolEnvironmental Science & Technology, 1988
- Development of High Efficiency Virtual ImpactorsAerosol Science and Technology, 1988
- Characterization of large particles at a rural site in the eastern United States: Mass distribution and individual particle analysisAtmospheric Environment (1967), 1985
- Characteristics of Nuclepore filters with large pore size—II. Filtration propertiesAtmospheric Environment (1967), 1983
- The physical characteristics of sulfur aerosolsAtmospheric Environment (1967), 1978
- Analysis of Respirable Fractions in Atmospheric Particulates via Sequential FiltrationJournal of the Air Pollution Control Association, 1977
- A two stage respirable aerosol sampler using nuclepore filters in seriesAtmospheric Environment (1967), 1977