Electron Microscopic Analysis of Airborne Asbestos Fibers
作者:
PatrickN. Breysse,
期刊:
Critical Reviews in Analytical Chemistry
(Taylor Available online 1991)
卷期:
Volume 22,
issue 3-4
页码: 201-227
ISSN:1040-8347
年代: 1991
DOI:10.1080/10408349108055029
出版商: Taylor & Francis Group
关键词: asbestos;TEM;SEM;electron microscopy.
数据来源: Taylor
摘要:
Scanning and transmission electron microscopic (SEM and TEM) methods for airborne asbestos analysis are reviewed. Electron microscopy has been used since the 1950s to evaluate airborne asbestos size distributions. More recently, methods have been developed to evaluate airborne fiber concentrations in occupational and nonoccupational environments. Developments of recent SEM and TEM methods are presented and discussed. This review focuses on filter preparation, fiber counting, and fiber identification issues. Issues discussed include the type of electron microscope to be used, SEM or TEM; the type of filter media to be used, Nuclepore polycarbonate of membrane filter varietes; and the choice of sample transfer technique, direct or indirect. Due to limited analytical capabilities, SEM methods have received limited use. Standardized TEM analytical methods have been developed, resulting in the routine use of TEM analysis for airborne air samples.
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