ASTM E2224-19
Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy

Standard No.

ASTM E2224-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E2224-22

Latest

ASTM E2224-23ae1

Scope

1.1 Infrared (IR) spectroscopy is a valuable method of fiber polymer identification and comparison in forensic examinations. The use of IR microscopes, coupled with Fourier transform infrared (FTIR) spectrometers, has greatly simplified the IR analysis of single fibers, thus making the technique feasible for routine use in the forensic laboratory. This guide provides basic recommendations and information about IR spectrometers and accessories, with an emphasis on sampling techniques specific to fiber examinations. The particular method(s) employed by each examiner or laboratory will depend upon available equipment, examiner training, sample suitability, and sample size. 1.2 This guide is intended for examiners with a basic knowledge of the theory and practice of IR spectroscopy, as well as experience in the handling and forensic examination of fibers. In addition, this guide is to be used in conjunction with a broader analytical scheme. 1.3 If polymer identification is not readily apparent from optical data alone, an additional method of analysis, such as microchemical tests, melting point, IR spectroscopy, Raman spectroscopy, or pyrolysis gas chromatography, should be used. An advantage of IR spectroscopy is that the instrumentation is readily available in most forensic laboratories and the technique is minimally destructive. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard cannot replace knowledge, skills, or abilities acquired through education, training, and experience and is to be used in conjunction with professional judgment by individuals with such discipline-specific knowledge, skills, and abilities. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E2224-19 Referenced Document

• ASTM D123 Standard Terminology Relating to Textiles*， 2023-09-14 Update
• ASTM E131 Standard Definitions of Terms and Symbols Relating to Molecular Spectroscopy
• ASTM E1421 Standard Practice for Describing and Measuring Performance of Fourier Transform Mid-Infrared (FT-MIR) Spectrometers: Level Zero and Level One Tests*， 2021-09-01 Update
• ASTM E1459 Standard Guide for Physical Evidence Labeling and Related Documentation
• ASTM E1492 Standard Practice for Receiving, Documenting, Storing, and Retrieving Evidence in a Forensic Science Laboratory
• ASTM E2228 Standard Guide for Microscopical Examination of Textile Fibers*， 2023-05-01 Update

ASTM E2224-19 history

• 2023 ASTM E2224-23ae1 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2023 ASTM E2224-23a Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2023 ASTM E2224-23 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2022 ASTM E2224-22 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2019 ASTM E2224-19 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2018 ASTM E2224-18 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2010 ASTM E2224-10 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy
• 2002 ASTM E2224-02 Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy