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Forensic sciences - Examination methods for minerals - X-ray diffractometry
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Basic data
| Standard ID | GA/T 2079-2023 (GA/T2079-2023) |
| Description (Translated English) | Forensic sciences - Examination methods for minerals - X-ray diffractometry |
| Sector / Industry | Public Security (Police) Industry Standard (Recommended) |
| Classification of Chinese Standard | A92 |
| Classification of International Standard | 13.310 |
| Word Count Estimation | 9,989 |
| Date of Issue | 2023-03-01 |
| Date of Implementation | 2023-12-01 |
| Issuing agency(ies) | Ministry of Public Security |
GA/T 2079-2023: Forensic sciences - Examination methods for minerals - X-ray diffractometry
---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.
ICS 13.310
CCSA92
Public safety industry standards of the People's Republic of China
Forensic Science Mineral Testing X-Ray Diffraction
Published on 2023-03-01
Implemented on 2023-12-01
Released by the Ministry of Public Security of the People's Republic of China
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.
Please note that some content in this document may be subject to patents. Release of this document
The Agency assumes no responsibility for identifying patents.
This document is submitted by the Criminal Investigation Bureau of the Ministry of Public Security.
This document is under the jurisdiction of the Physical and Chemical Inspection Sub-Technical Committee of the National Technical Committee for Standardization of Criminal Technology (SAC/TC179/SC4).
This document was drafted by. Ministry of Public Security Appraisal Center, Guizhou Provincial Public Security Forensic Appraisal Center, Beijing Municipal Public Security Forensic Appraisal Center, Chongqing Municipal Public Security Bureau
Security Bureau Physical Evidence Identification Center.
The main drafters of this document. Wang Ping, Zhu Jun, Guo Hongling, Quan Yangke, Tian Renkui, Wang Lixiong, Chen Jianhong, Wang Lichun, Mei Hongcheng, Hu Can,
Li Haiyan, Li Yanchao, Ma Jian.
Forensic Science Mineral Testing X-Ray Diffraction
1 Scope
This document specifies the X-ray diffraction analysis method for mineral species in soil, rock and other samples in the field of forensic science.
This document is suitable for the qualitative analysis of minerals in soil, rock and other samples in the field of forensic science, and can also be used as a reference in other fields.
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 14666 Analytical Chemistry Terminology
GA/T 242 Terminology for physical and chemical examination of trace evidence in forensic science
SY/T 5163 X-ray diffraction analysis method of clay minerals and common non-clay minerals in sedimentary rocks
3 Terms and definitions
The following terms and definitions as defined in GB/T 14666, GA/T 242 and SY/T 5163 apply to this document.
3.1
rose quartz crystalpowder
A combination of many randomly arranged crystallites with different orientations.
3.2
orientedslide
The suspension of soil relies on liquid wetting and surface tension to spread on a horizontally placed glass slide. After drying, the mineral bottom surface is formed.
Samples oriented parallel to the slide.
4 Principles
Soil, rocks, etc. are mainly composed of minerals. Minerals usually have a crystal structure, and X-rays of a certain wavelength are emitted by the mineral sample.
Due to the regular arrangement of atoms or ions in the crystal, the scattered X-rays are strengthened in certain directions, resulting in the formation of
Diffraction phenomena corresponding to the crystal structure. Using an X-ray diffractometer, different mineral crystals produce different diffraction effects on X-rays.
Qualitative analysis of mineral species.
5 Reagents and materials
Reagents and materials include.
a) Distilled water;
b) Glycerol (C3H8O3, analytical grade);
c) Magnesium chloride hexahydrate (MgCl2·6H2O, analytical grade);
...
