A Legally Defensible Operating Procedure for Asbestos Analysis by Transmission Electron Microscopy with Emphasis on Asbestos in Talc-Containing Materials
THE MICROSCOPE
2025, Volume 72:3, pp. 110–123
DOI
https://doi.org/10.59082/PZKQ6211
AUTHOR
Shu-Chun Su
ABSTRACT
The author has developed a comprehensive operating procedure for asbestos analysis utilizing analytical transmission electron microscopy (TEM). This methodology is designed to be technically thorough, scientifically rigorous, and legally defensible, ensuring the quality, integrity, and reproducibility of asbestos testing, particularly in talc-containing cosmetic products. Additionally, the author provides an essential resource: a comprehensive suite of d-spacing and interfacial angle look-up tables for the identification of regulated asbestos minerals and other relevant minerals. Furthermore, a dual-zone-axis selected area electron diffraction (SAED) method is proposed to enable unequivocal confirmation of amphibole asbestos, with a particular emphasis on anthophyllite.
CORRECTION: On page 121 of the published article, the Metric Tensor (MT) equation is incomplete where a portion of the entries in the third column and right square bracket symbol are not showing. The equation has been corrected here. Download/view the corrected Metric Tensor (MT) equation.
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