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Forensic sciences - Examination methods for plastics - Differential scanning calorimetry(DSC)
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Basic data
| Standard ID | GA/T 2080-2023 (GA/T2080-2023) |
| Description (Translated English) | Forensic sciences - Examination methods for plastics - Differential scanning calorimetry(DSC) |
| Sector / Industry | Public Security (Police) Industry Standard (Recommended) |
| Classification of Chinese Standard | A92 |
| Classification of International Standard | 13.310 |
| Word Count Estimation | 14,141 |
| Date of Issue | 2023-03-01 |
| Date of Implementation | 2023-12-01 |
| Issuing agency(ies) | Ministry of Public Security |
GA/T 2080-2023: Forensic sciences - Examination methods for plastics - Differential scanning calorimetry(DSC)
---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 Plastic Inspection Differential Scanning Calorimetry
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. The publisher of this document 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. Beijing Municipal Public Security Forensic Identification Center, Ministry of Public Security Identification Center, China People’s Public Security University, China Criminal Police
Academy.
The main drafters of this document. Liu Huijuan, Wu Yanyan, Wei Chuice, Li Yanchao, Chen Jianhong, Zhu Jun, Wang Ping, Jiang Hong, Li Jimin, and Lu Yinni.
Forensic Science Plastic Inspection Differential Scanning Calorimetry
1 Scope
This document specifies the analytical methods and basic requirements for differential scanning calorimeter testing of plastics in the field of forensic science.
This document is suitable for comparative inspection of plastics 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 19267.12 Physical and chemical examination of criminal technical trace evidence Part 12.Thermal analysis method
GB/T 19466.1 Differential Scanning Calorimetry (DSC) for Plastics Part 1.General Principles
GB/T 19466.3 Differential Scanning Calorimetry (DSC) for Plastics Part 3.Determination of Melting and Crystallization Temperatures and Enthalpies
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 19267.12, GB/T 19466.1, GB/T 19466.3 and GA/T 242 apply to this document.
4 Principles
Differential scanning calorimetry is a method of measuring the heat flow rate or addition input to the sample and reference material under a program-controlled temperature and a certain atmosphere.
The relationship between thermal power difference and temperature or time is used to characterize the analysis method of thermodynamic parameters such as enthalpy change and melting point.
Plastic is a polymer material. Different types of plastics have different thermodynamic parameters. The same plastic produced by different manufacturers or in different batches of the same manufacturer
The raw material sources and technological processes may be different, and their thermodynamic parameters may be different. Differential scanning calorimetry can be used to compare them.
test.
5 Reagents and materials
Reagents and materials include.
a) Indium or tin standard sample;
b) Absolute ethanol (C2H5OH, analytical grade);
c) Deionized water;
d) High purity nitrogen (N2);
e) Sample dish (aluminum sample dish, ceramic sample dish or platinum sample dish);
f) Tweezers;
g) scalpel;
h) Hole punch.
...
