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GA/T 1938-2021 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GA/T 1938-2021: Forensic sciences - Examination methods for metal - Scanning electron microscope/energy dispersive X-ray spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GA/T 1938-2021	189	Add to Cart	3 days	Forensic sciences - Examination methods for metal - Scanning electron microscope/energy dispersive X-ray spectrometry	Valid

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Basic data

Standard ID: GA/T 1938-2021 (GA/T1938-2021)
Description (Translated English): Forensic sciences - Examination methods for metal - 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: 8,855
Date of Issue: 2021-10-14
Date of Implementation: 2022-05-01
Issuing agency(ies): Ministry of Public Security

GA/T 1938-2021: Forensic sciences - Examination methods for metal - 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 metal - Scanning electron microscope/energy dispersive X-ray spectrometry ICS 13.310 CCSA92 People's Republic of China Public Security Industry Standards Forensic Science Metal Testing 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. Drafters of this document. Ding Feng, Zhang Zhenyu, Shi Huixia. Forensic Science Metal Testing Scanning Electron Microscopy/X-ray Spectroscopy

1 Scope

This document specifies the method for examining the elemental composition of metal evidence by scanning electron microscope/X-ray energy spectrometer in the field of forensic science. This document is applicable to the elemental composition analysis and comparative inspection of metal 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

Except for lithium and beryllium, the common metal elements in nature are all within the detection range of scanning electron microscope/X-ray energy spectrum analysis method. answer A scanning electron microscope/X-ray energy spectrometer can be used to obtain the energy spectrum of the characteristic X-rays of each element in the metal sample; The position and intensity of the peak can be used for qualitative and semi-quantitative analysis of the contained elements. See Appendix A for common metal evidence and its main components.

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) sample stage with conductive adhesive surface; e) Scalpels, tweezers, diamond drill bits, diamond files; f) Sandpaper, emery cloth, grinding wheel (all above.200 mesh); g) polishing agent; h) Ethanol (C2H6O, analytical or chromatographically pure), deionized water. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GA/T 1938-2021_English be delivered?

Answer: Upon your order, we will start to translate GA/T 1938-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GA/T 1938-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GA/T 1938-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.