Record Display for the EPA National Library Catalog

RECORD NUMBER: 16 OF 927

OLS Field Name OLS Field Data
Main Title Advances in the Measurement of Ambient Carbon Fibers.
Author Loo, B. W. ; Adler, T. C. ; Goulding, F. S. ; Landis, D. A. ; Madden, N. W. ;
CORP Author California Univ., Berkeley. Lawrence Berkeley Lab.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1984
Report Number EPA/600/J-84/318;
Stock Number PB85-230373
Additional Subjects Fiber composites ; Air pollution ; Carbon fibers ; Industrial hygiene ; Measuring instruments ; Monitors ; Design criteria ; Performance evaluation ; Reprints ; Occupational safety and health ; Indoor air pollution
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-230373 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 9p
Abstract
Methodologies that have been used in a number of passive collectors and active detectors for measuring ambient carbon fibers are summarized. The need for improved performance in terms of specificity, sensitivity, detection efficiency, accuracy, precision, speed, stability and serviceability have been identified. The design principles for a new detector based on the technique of measuring the induced charge acquired by a conducting fiber in an electric field have been discussed in detail. A prototype of such a detector has been tested to cover the measurement of fiber length distributions between 0.08 mm and 9 mm, and fiber concentrations between 1-1,000,000 fibers/cu m of air. The precision of the instrument has been demonstrated to be about 2% for fibers in the 1-9 mm range and approaching one fiber diameter (or 10 micrometers) for the submillimeter fibers.