Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Equipment and Procedures for Mounting Millipore Filters and Counting Asbestos Fibers by Phase Contrast Microscopy.

Authors
Bayer-SG; Zumwalde-RD; Brown-TA
Source
Consumer Protection and Environmental Health Service, Environmental Control Administration, U.S. Department of Health, Education, and Welfare, 1969 Jul:19 pages
Link
NIOSHTIC No.
00197964
Abstract
A simple and inexpensive sampling method was described for the determination of concentrations of asbestos (1332214) dust in the air for comparison with established hygiene limits. The results obtained were reproducible. The method used disposable plastic membrane filter holders, preloaded with membrane filters. These membrane filters may be made transparent and the asbestos fibers then counted with a phase contrast microscopy at 430X or 400X. The Asbestosis Research Council in Great Britain has used this method as has the United States Public Health Service. This was also the method specified in the proposed change for asbestos in the 1968 Threshold Limit Values of the American Conference of Governmental Industrial Hygienists. The details of the equipment needed and the procedure to be followed if one is to obtain reproducible results were described.
Keywords
Analytical-methods; Chemical-analysis; Analytical-chemistry; Asbestos-dust; Airborne-fibers; Fibrous-dusts; Air-quality-monitoring;
CAS No.
1332-21-4;
Publication Date
19690701
Document Type
Other;
Fiscal Year
1969
NTIS Accession No.
PB91-184507
NTIS Price
A03
Source Name
Consumer Protection and Environmental Health Service, Environmental Control Administration, U.S. Department of Health, Education, and Welfare, 19 pages
TOP