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Gunshot Residue (GSR) Classification by SEM-EDS under ASTM E1588

Scientia Forensis Contributors

Published: October 17, 2026 • 174 words (1 min read)

Overview & Learning Objectives

Standardized elemental and morphological criteria for classifying Characteristic vs. Consistent primer gunshot residue (pGSR) particles using Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (SEM-EDS).

Table of Contents

1. Morphological & Elemental Requirements (ASTM E1588)

Primer gunshot residue (pGSR) condenses from vaporized inorganic primer constituents—classically lead styphnate (initiator), barium nitrate (oxidizer), and antimony sulfide (fuel)—producing spheroidal particles ($0.5\text{ }\mu\text{m} - 10\text{ }\mu\text{m}$) detected via Backscattered Electron (BSE) imaging.

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1 min Full Study Time

Intermediate Difficulty Level

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