GB/T 16840.7-2021 English PDF

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GB/T 16840.7-2021: Technical determination methods for electrical fire evidence - Part 7: Component analytic method of energy dispersive spectrometry
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16840.7-2021	119	Add to Cart	3 days	Technical determination methods for electrical fire evidence - Part 7: Component analytic method of energy dispersive spectrometry	Valid

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GB/T 16840.2   GB/T 14403   GB/T 14402   GB/T 16840.4   GB/T 16840.8   GB/T 16840.3   

Basic data

Standard ID: GB/T 16840.7-2021 (GB/T16840.7-2021)
Description (Translated English): Technical determination methods for electrical fire evidence - Part 7: Component analytic method of energy dispersive spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C80;C89
Word Count Estimation: 6,675
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16840.7-2021: Technical determination methods for electrical fire evidence - Part 7: Component analytic method of energy dispersive 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.
Technical determination methods for electrical fire evidence - Part 7.Component analytic method of energy dispersive spectrometry ICS 13.220.20 CCSC80/89 National Standards of People's Republic of China Technical Appraisal Method of Electrical Fire Trace Material Evidence Part 7.EDS component analysis method Released on 2021-08-20 2021-08-20 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ Introduction Ⅱ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Principle 1 5 Equipment 2 5.1 Scanning Electron Microscope 2 5.2 X-ray energy spectrometer 2 5.3 Other required equipment 2 6 Preparation of test materials 2 7 Inspection of seized materials 2 8 Results 3

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 of Standardization Documents" Drafting. This document is the seventh part of GB/T 16840 "Technical Appraisal Method for Electrical Fire Trace Evidence". GB/T 16840 has been released The following parts. ---Part 1.Macro Law; ---Part 2.Remanence detection method; ---Part 3.Auger analysis method; ---Part 4.Metallographic Analysis; ---Part 5.Identification and extraction methods of electrical fire material evidence; ---Part 6.SEM microscopic morphology analysis method; ---Part 7.EDS component analysis method; ---Part 8.Thermal analysis method. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the Ministry of Emergency Management of the People's Republic of China. This document is under the jurisdiction of the National Fire Standardization Technical Committee (SAC/TC113). This document was drafted by. Shenyang Fire Research Institute of the Ministry of Emergency Management, Tianjin Fire Research Institute of the Ministry of Emergency Management, and Sichuan Fire Protection of the Ministry of Emergency Management Research Institute, Shanghai Fire Research Institute of Emergency Management Department. The main drafters of this document. Zhang Ming, E Dazhi, Xia Dawei, Di Man, Gao Wei, Zhang Bin, Wang Lifen, Cao Liying.

Introduction

The identification of electrical fire evidence is an important part of the investigation of the cause of fire by emergency rescue and firefighting agencies, especially when it is accompanied by national The improvement of the legal system of the family, the enhancement of citizens’ awareness of the legal system, the identification of physical evidence has been used as strong evidence for the identification of the cause of the fire, and it is a fire rescue agency. The determination of the cause of the fire provides scientific, fast and accurate technical support. In this regard, my country has established a technology for evidence of electrical fire traces. National standard system for identification methods. In this standard system, GB/T 16840 "Technical Appraisal Method for Electrical Fire Trace Material Evidence" is a guide for me The method and basis for the relevant agencies of the country to engage in the identification of electrical fire evidence is planned to consist of eight parts, and the purpose is to establish Trace physical evidence for macro analysis, remanence analysis, Auger analysis, metallographic analysis, physical evidence identification and extraction, SEM microscopic morphology analysis, and component analysis And the method and basis for thermal analysis. ---Part 1.Macro Law. ---Part 2.Remanence detection method. ---Part 3.Auger analysis method. ---Part 4.Metallographic Analysis Method. ---Part 5.Identification and extraction methods of electrical fire material evidence. ---Part 6.SEM microscopic morphology analysis method. ---Part 7.EDS component analysis method. ---Part 8.Thermal analysis method. The EDS component analysis method is a semi-quantitative analysis method used in the identification of electrical fire traces in my country. It is used in scientific research projects. "Research on the Analysis and Appraisal Technology of Micro-zone Composition on the Surface of Copper Conductor Melt Marks" basic test data and years of actual fire material evidence appraisal of the actual work Based on the proposal, it has been verified in the actual fire scene and proved to be feasible. The formulation of this document mainly refers to GB/T 16840 The first six parts provide detailed regulations on the preparation of the EDS component analysis method, the detection and results of the sample, to ensure the compilation of this document Meet the requirements, the content is practical and reliable. Technical Appraisal Method of Electrical Fire Trace Material Evidence Part 7.EDS component analysis method

1 Scope

This document specifies the principle and instrument design of the EDS (X-ray energy spectrometer) component analysis method in the technical identification method for electrical fire traces. Preparation of equipment and inspection materials, inspection and results of inspection materials. This document is applicable to the field of fire material evidence identification to test the elemental composition and content of the trace material The traceability and identity comparison analysis of the element.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 13966 Terminology for analytical instruments GB/T 19267.6 Physical and Chemical Examination of Trace Material Evidence in Criminal Technology Part 6.Scanning Electron Microscope/X-ray Energy Spectrometer GB/T 20162 Fire technology appraisal material evidence extraction method

3 Terms and definitions

The terms and definitions defined in GB/T 13966, GB/T 19267.6, GB/T 20162, and the following terms and definitions apply to this document. 3.1 EDS component analysis method componentanalytic method of energydispersive spectrometry Use a particle beam with a certain energy and intensity to bombard the sample material, according to the energy and intensity of the X-rays excited or reflected by the sample material The relationship diagram of degree (called energy spectrum) realizes the method of non-destructive element analysis, structure analysis and surface physical and chemical characteristics analysis of the sampled materials. 3.2 Microcosmic composition The elemental composition and content in the area of several micrometers to tens of micrometers on the evidence.

4 Principle

The same elements contained in the trace evidence at the fire scene, regardless of their state, emit characteristic X-rays that have the same characteristics. The same energy. Measure the intensity of characteristic X-rays of fire traces as the basis of quantitative analysis; it can be divided into quantitative analysis with standard samples and determination without standard samples. Two kinds of quantitative analysis. When there is a standard sample to analyze the sample, the measured X-ray intensity of each element in the sample is compared with the spectral line intensity of the same name of the standard sample In contrast, after background correction and matrix correction, the absolute content can be calculated more accurately; when there is no standard sample quantitative analysis, the same name or the same name or The measured intensities of different spectral lines are compared with each other, and their relative content is calculated after background correction. ......

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