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Forensic sciences - Examination methods for synthetic fibers - Differential scanning calorimetry
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Basic data
| Standard ID | GA/T 1994-2022 (GA/T1994-2022) |
| Description (Translated English) | Forensic sciences - Examination methods for synthetic fibers - Differential scanning calorimetry |
| Sector / Industry | Public Security (Police) Industry Standard (Recommended) |
| Classification of Chinese Standard | A92 |
| Classification of International Standard | 13.310 |
| Word Count Estimation | 14,182 |
| Date of Issue | 2022-06-15 |
| Date of Implementation | 2022-10-01 |
| Issuing agency(ies) | Ministry of Public Security |
| Summary | This standard is applicable to the comparative inspection of the same type of synthetic fibers in the field of forensic science, and can also be used for reference in other fields. |
GA/T 1994-2022: Forensic sciences - Examination methods for synthetic fibers - Differential scanning calorimetry
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ICS13:310
CCSA92
People's Republic of China Public Security Industry Standards
Forensic Science Synthetic Fiber Inspection
Differential Scanning Calorimetry
Released on 2022-06-15
2022-10-01 Implementation
Released by the Ministry of Public Security of the People's Republic of China
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: Ministry of Public Security Evidence Appraisal Center, China Criminal Police Academy:
The main drafters of this document: Sun Zhenwen, Wang Ping, Tao Keming, Zhu Jun, Shi Huixia, Qiao Ting, Zhang Guannan, Hu Can, Wang Yan, Li Xinqian, Li Hongda,
Lu Yinni:
Forensic Science Synthetic Fiber Inspection
Differential Scanning Calorimetry
1 Scope
This document specifies the analytical methods and basic requirements for the examination of synthetic fibers by differential scanning calorimetry (DSC) in the field of forensic science:
This document is applicable to the comparison and inspection of the same type of synthetic fibers 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 6425 thermal analysis terms
GB/T 19267:12 Physical and Chemical Examination of Trace Evidence in Criminal Technology Part 12: Thermal Analysis Method
GA/T 242 Physicochemical Examination Terminology for Trace Evidence in Forensic Science
3 Terms and Definitions
The terms and definitions defined in GB/T 6425, GB/T 19267:12 and GA/T 242 apply to this document:
4 principles
Under program-controlled temperature and a certain atmosphere, by measuring the heat flow rate or heating power difference between the input sample and the reference substance and the temperature or time
The relationship between them can characterize multiple thermodynamic parameters such as enthalpy change and melting point: Synthetic fibers are made of polymer materials by melt spinning, different types
Synthetic fibers differ in their thermodynamic parameters: Synthetic fibers produced by different manufacturers have different thermodynamic parameters due to different sources of raw materials and different technological processes:
There may be differences, and the thermodynamic parameters of synthetic fibers can be compared and analyzed by DSC:
5 Reagents and materials
5:1 Reagents
Reagents include:
a) Ethanol (C2H5OH, analytically pure);
b) Deionized water:
5:2 Materials
Materials include:
a) Sample dish (aluminum sample dish, ceramic sample dish or platinum sample dish);
b) Reference substance (calcined alumina);
...
