SYMPOSIA PAPER Published: 20 December 2021
STP163220200056

ASTM International Research Report and Inter-Laboratory Study for Development and Validation of ASTM D6480-19,

Source

Nine ASTM D2207 member laboratories took part in a study to determine required precision and bias statistics for this analytical method designed to measure asbestos in surface dust. A fine powder sample of World Trade Center dust was aerosolized in a test chamber and allowed to settle before collecting surface dust in prescribed grid squares. Laboratories were instructed to utilize the ASTM D6480, Standard Test Method for Wipe Sampling of Surfaces, Indirect Preparation, and Analysis for Asbestos Structure Number Surface Loading by Transmission Electron Microscopy, analytical method for preparing, analyzing, and reporting data. Section 22 of the standard includes the precision section from ASTM Inter-Laboratory Study (ILS) group, “The average repeatability limit, as estimated from the 25 pairs of samples, is 165,000 structures per cm2.” The experimental design as well as analytical and statistical results are discussed along with comparisons to previous ASTM D5755, Standard Test Method for Microvacuum Sampling and Indirect Analysis of Dust by Transmission Electron Microscopy for Asbestos Structure Number Surface Loading, Inter-Laboratory Studies (ILS) for asbestos in surface dust measurements. In addition, the challenges and historical context of this current, previous, and future proposed asbestos ILS reports are detailed. These successful studies increase the overall value of these analytical tools to investigators worldwide.

Author Information

Ehrenfeld, Frank, E.
International Asbestos Testing Laboratories, Mt. Laurel, NJ, US
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Pages: 500–512
DOI: 10.1520/STP163220200056
ISBN-EB: 978-0-8031-7711-6
ISBN-13: 978-0-8031-7710-9