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GB/T 19267.1-2023: Forensic sciences - Physical and chemical examination of trace evidence - Part 1: Infrared absorption spectrometry
Status: Valid GB/T 19267.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 19267.1-2023 | English | 249 |
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Forensic sciences - Physical and chemical examination of trace evidence - Part 1: Infrared absorption spectrometry
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GB/T 19267.1-2023
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| GB/T 19267.1-2008 | English | 479 |
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Physical and chemical examination of trace evidence in forensic sciences -- Part 1: Infrared absorption spectrometry
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GB/T 19267.1-2008
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| GB/T 19267.1-2003 | English | 399 |
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Physical and chemical examination of trace evidence in forensic sciences -- Part 1: Infrared absorption spectrometry
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GB/T 19267.1-2003
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Basic data | Standard ID | GB/T 19267.1-2023 (GB/T19267.1-2023) | | Description (Translated English) | Forensic sciences - Physical and chemical examination of trace evidence - Part 1: Infrared absorption spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 07.140 | | Word Count Estimation | 12,148 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-06-01 | | Older Standard (superseded by this standard) | GB/T 19267.1-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 19267.1-2023: Forensic sciences - Physical and chemical examination of trace evidence - Part 1: Infrared absorption spectrometry
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ICS 07:140
CCSA92
National Standards of People's Republic of China
Replace GB/T 19267:1-2008
Physical and chemical examination of trace evidence in forensic science
Part 1: Infrared absorption spectrometry
Published on 2023-11-27
2024-06-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is Part 1 of GB/T 19267: GB/T 19267 has released the following parts:
---Part 1: Infrared absorption spectrometry;
---Part 2: UV-visible absorption spectrometry;
---Part 3: Molecular fluorescence spectrometry;
---Part 4: Atomic emission spectrometry;
---Part 5: Atomic absorption spectrometry;
---Part 6: Scanning electron microscopy/X-ray spectroscopy;
---Part 7: Gas Chromatography-Mass Spectrometry;
---Part 8: Microspectrophotometry;
---Part 9: Thin layer chromatography;
---Part 10: Gas Chromatography;
---Part 11: High performance liquid chromatography;
---Part 12: Thermal analysis method:
This document replaces GB/T 19267:1-2008 "Physical and chemical examination of criminal technical trace evidence - Part 1: Infrared absorption spectroscopy"
"Law", compared with GB/T 19267:1-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows:
---Changed the standard name (see cover, cover of:2008 edition);
---Changed the applicable field, changing "criminal technology" to "forensic science" (see Chapter 1, Chapter 1 of the:2008 edition);
---Added the terms "baseline" and "high-pressure diamond cell" (see 3:1, 3:3), changed the "attenuated total reflection method", "diffuse reflection method" and "specular reflection method":
"Photoacoustic spectroscopy" (see 3:4~3:7, 3:12~3:15 of the:2008 edition), and some terms were deleted (see the:2008 edition of
3:1~3:7, 3:9~3:11, 3:16~3:19);
---Changed and reclassified instruments and materials (see Chapter 5, Chapter 5 of the:2008 edition), added "accessory devices" (see 5:3) and
"Combined device" (see 5:4);
---Changed some contents of "Instrument Calibration" (see Chapter 6, 5:2:1 of the:2008 edition);
---The content of "detection" has been changed and refined (see Chapter 8, 7:1 of the:2008 edition);
---Added relevant content of "Qualitative Analysis" (see Chapter 9);
--- Added the content of "result expression" (see Chapter 10):
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is under the jurisdiction of the National Criminal Technology Standardization Technical Committee (SAC/TC179):
This document was drafted by: Shandong Provincial Public Security Department Physical Evidence Identification Research Center, Ministry of Public Security Identification Center, Tai'an Municipal Public Security Bureau Criminal Science and Technology
graduate School:
The main drafters of this document: Hao Suyuan, Gao Hong, Wang Ping, Li Haiyan, Zhou Zheng, and Li Wenhai:
The previous versions of this document and the documents it replaces are as follows:
---First published as GB/T 19267:1-2003 in:2003, first revised in:2008;
---This is the second revision:
Introduction
GB/T 19267 is a professional basic standard for forensic scientific trace evidence examination, aiming to improve the quality of identification and unify identification results:
Discussion, increase the credibility of identification opinions, and provide norms and guidance for forensic scientific trace evidence examination:
GB/T 19267 is planned to consist of 12 parts:
---Part 1: Infrared absorption spectrometry:
---Part 2: UV-visible absorption spectrometry:
---Part 3: Molecular fluorescence spectrometry:
---Part 4: Atomic emission spectrometry:
---Part 5: Atomic absorption spectrometry:
---Part 6: Scanning electron microscopy/X-ray spectroscopy:
---Part 7: Gas Chromatography-Mass Spectrometry:
---Part 8: Microspectrophotometry:
---Part 9: Thin layer chromatography:
---Part 10: Gas Chromatography:
---Part 11: High performance liquid chromatography:
---Part 12: Thermal analysis method:
This document examines the physical and chemical analysis of paint, plastics, rubber, fibers, adhesives, toners, explosives, grease, poisons, drugs and other materials used in trace evidence:
Inspection plays an important role: It has been more than 13 years since the last version of GB/T 19267:1 was released: Due to the infrared spectroscopy detection of trace evidence in forensic science,
During the development of experimental technology, many new analysis techniques and methods were produced, and many contents that needed to be added and deleted were also discovered, such as due to
Modification of technical parameters caused by improvement of instrument performance, addition of new methods, deletion of obsolete methods, modification of result analysis presentation, etc:
They are all different from technological development and current practice, and it is indeed necessary to revise and improve them: In view of this, this document will be officially launched again in 2021:
Revision:
Physical and chemical examination of trace evidence in forensic science
Part 1: Infrared absorption spectrometry
1 Scope
This document describes infrared absorption spectroscopic examination methods in forensic science examination of trace evidence:
This document is applicable to the physical and chemical examination of trace evidence in the field of forensic science:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document:
GB/T 8322 Molecular absorption spectrometry terminology
GB/T 14666 Analytical Chemistry Terminology
GA/T 242 Terminology for physical and chemical examination of trace evidence in forensic science
3 Terms and definitions
The terms and definitions defined in GB/T 8322, GB/T 14666, GA/T 242 and the following apply to this document:
3:1
baselinebaseline
In the absorption spectrum, it is used to represent the background absorption curve when the absorption band does not exist:
3:2
beamsplitter
A semi-reflective device that can transmit 50% of incident light and reflect 50%:
3:3
A sample cell made of diamond used to prepare samples under high pressure to measure infrared spectra:
3:4
An infrared spectroscopy method established based on the total reflection phenomenon of light and used to measure highly absorbing samples or sample surfaces:
Note: When infrared light is incident on a high refractive index crystal close to the surface of the sample at an angle greater than the critical angle, total reflection occurs because the refractive index of the sample is lower than that of the crystal:
The infrared light only enters the very shallow surface layer: Only the incident light of certain frequencies is absorbed by the sample, and the rest is reflected: By measuring this attenuated radiation, we get
Attenuated total reflection infrared spectrum to the sample:
3:5
An infrared spectroscopy method for measuring powdered samples established based on the phenomenon of diffuse reflection of light:
Note: When infrared light irradiates the surface of the powdered sample, part of the light will produce specular reflection outside the surface sample particles, because the specular reflection beam does not enter:
The interior of the sample particles does not interact with the sample, so this part of the specular reflected light does not carry any information about the sample: Another part of the light will be incident on the sample particles
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