This webinar is to discuss the revisions to ANSI/ASTM E2926-17 Standard Test Method forForensic Comparison of Glass Using Micro X-ray Fluorescence Spectrometry, which was added tothe OSAC Registry in July 2017.
Target Discipline: Criminalistics
Speakers
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 Troy Ernst, MS
Forensic Scientist
Michigan State Police Grand Rapids Forensic Laboratory
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 Tatiana Trejos, PhD
Associate Professor
West Virginia University, Department of Forensic and Investigative Science
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Moderator
 Jennifer L. Remy, M.S.
Forensic Scientist III / Special Agent
Quality Operations
Laboratory Safety Officer, Internship Coordinator
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Webinar Abstract
ASTM E2926 is a widely adopted standard test method in forensic agencies for the forensiccomparison of glass using micro–X-ray Fluorescence (μ-XRF) spectrometry. The standard isdesigned for the determination and comparison of major, minor, and trace elements present in glassfragments using μ-XRF analysis. This test method is intended for the elemental comparison ofglass, supported by published research on elemental heterogeneity, discrimination capabilities,accuracy, bias, and precision. Soda-lime glass, used in the manufacture of containers, architectural,and automotive windows, is one of the most common types of glass submitted for elementalcomparisons that have been extensively studied using μ-XRF. The most recent version of the testmethod, last updated in May 2025, covers the application of μ-XRF using collimators, mono- andpoly-capillary optics, and an energy-dispersive X-ray detector (EDS), expanding its applicability tosilicon drift detectors (SDDs). In this webinar, we will discuss ASTM E2926-25, including thescope, significance, calibration and standardization, procedure, and calculations and interpretationof the data. We will provide an overview of the notable changes in the 2025 version, along withsupporting new research, implementation tips, and case examples to demonstrate how to compareμ-XRF spectral data.
A copy of ANSI/ASTM E2926-25 is available through the OSAC Compass;
https://compass.astm.org/document/?contentCode=ASTM%7CE2926-25%7Cen-US