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GA/T 1937-2021: Forensic sciences - Examination methods for rubber - Scanning electron microscope/energy dispersive X-ray spectrometry
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| GA/T 1937-2021 | English | 149 |
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Forensic sciences - Examination methods for rubber - Scanning electron microscope/energy dispersive X-ray spectrometry
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GA/T 1937-2021
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Basic data | Standard ID | GA/T 1937-2021 (GA/T1937-2021) | | Description (Translated English) | Forensic sciences - Examination methods for rubber - Scanning electron microscope/energy dispersive X-ray spectrometry | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 6,689 | | Date of Issue | 2021-10-14 | | Date of Implementation | 2022-05-01 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1937-2021: Forensic sciences - Examination methods for rubber - Scanning electron microscope/energy dispersive X-ray spectrometry
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Forensic sciences - Examination methods for rubber - Scanning electron microscope/energy dispersive X-ray spectrometry
ICS 13.310
CCSA92
People's Republic of China Public Security Industry Standards
Forensic Science Rubber Test
Scanning Electron Microscopy/X-ray Spectroscopy
Released on 10-14-2021
2022-05-01 implementation
Released by the Ministry of Public Security of the People's Republic of China
Published by China Standard Press
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document was proposed by the National Criminal Technology Standardization Technical Committee Physical and Chemical Inspection Sub-Technical Committee (SAC/TC179/SC4) and submitted
Focus on.
This document was drafted by. Criminal Technology Corps of Liaoning Provincial Public Security Department, China Criminal Police Academy, and Physical Evidence Appraisal Center of the Ministry of Public Security.
The main drafters of this document. Ding Feng, Zhang Zhenyu, Shi Huixia.
Forensic Science Rubber Test
Scanning Electron Microscopy/X-ray Spectroscopy
1 Scope
This document specifies a method for examining the elemental composition of rubber by scanning electron microscopy/X-ray spectroscopy in the field of forensic science.
This document is applicable to elemental composition analysis and comparative inspection of rubber evidence in the field of forensic science, and can also be used as a reference in other fields.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 14666 Analytical Chemistry Terminology
GA/T 242 Physicochemical Examination Terminology for Trace Evidence in Forensic Science
3 Terms and Definitions
The terms and definitions defined in GB/T 14666 and GA/T 242 apply to this document.
4 principles
Common elemental components in rubber include H, C, N, O, S, Cl, Ca, Ti, Mg, Al, Si, Zn, etc.
The line energy spectrometer can perform qualitative and semi-quantitative analysis of the elemental composition (atomic number Z≥6) in the rubber sample.
5 Instruments and materials
Instruments, equipment and materials include.
a) scanning electron microscope (SEM);
b) X-ray energy spectrometer (energy spectrometer), detection range B5~U92, resolution (MnKα) higher than 150eV;
c) optical stereo microscope;
d) Vacuum coating apparatus or ion sputtering coating apparatus;
e) sample stage with conductive adhesive surface;
f) Scalpel, tweezers;
g) Ethanol (C2H6O, analytical or chromatographically pure), deionized water.
6 Sample preparation
6.1 For rubber product samples, after cleaning the surface of the sample with deionized water and ethanol and drying it, under an optical stereomicroscope, use a scalpel
Cut a sample sheet larger than 2mm2 and place it on a sample stage with a conductive adhesive surface.
6.2 For tiny samples or tiny amounts of rubber attached to objects, use tweezers to separate them from the carrier under an optical stereomicroscope, and place them in
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