GB/T 42645-2023 English PDF

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GB/T 42645-2023: Gems testing - Ultraviolet-visible absorption spectroscopy
Status: Valid

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GB/T 42645-2023	1419	Add to Cart	8 days	Gems testing - Ultraviolet-visible absorption spectroscopy	Valid

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GB/T 16552   GB/T 5195.12   SN/T 0481.7   GB/T 45611   GB/T 44910   

Basic data

Standard ID: GB/T 42645-2023 (GB/T42645-2023)
Description (Translated English): Gems testing - Ultraviolet-visible absorption spectroscopy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D59
Classification of International Standard: 39.060
Word Count Estimation: 70,754
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42645-2023: Gems testing - Ultraviolet-visible absorption spectroscopy

---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 39:060 CCSD59 National Standards of People's Republic of China Jewelry and Jade Identification by Ultraviolet-visible Absorption Spectroscopy Released on 2023-05-23 2023-12-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Method principle 2 5 Instruments and equipment 2 5:1 Instrument 2 5:2 Instrument Composition 2 5:3 Instrument working conditions 2 5:4 Instrument Performance Verification 2 6 sample 2 6:1 Sample requirements 2 6:2 Preparation before the test 2 7 Test Step 3 7:1 Boot 3 7:2 Select test method 3 7:3 Setting test parameters 3 7:4 Subtracting background 3 7:5 Sample test 3 7:6 Spectrum recording and analysis 3 8 UV-visible absorption spectrum analysis 3 8:1 Reference Spectroscopy 3 8:2 Characteristic absorption peak method 3 8:3 Precautions 4 9 results show 4 Appendix A (Informative) Verification of UV-Vis spectrometer 5 A:1 Technical requirements 5 A:2 Verification method 5 A:3 Verification cycle 5 Appendix B (Informative) UV-Vis Absorption Spectra of Jewelry and Jade Varieties Figure 6 B:1 Explanation on the Collection of Maps 6 B:2 UV-visible absorption spectra of main jewelry and jade varieties Figure 6 B:2:1 Diamond 6 B:2:2 Ruby 13 B:2:3 Sapphire14 B:2:4 Chrysoberyl18 B:2:5 Alexandrite 18 B:2:6 Emerald 19 B:2:7 Beryl 22 B:2:8 Tourmaline 24 B:2:9 Spinel 25 B:2:10 Crystal 27 B:2:11 Zircon 28 B:2:12 Topaz 30 B:2:13 Peridot 31 B:2:14 Garnet 31 B:2:15 Feldspar34 B:2:16 Stereotype 35 B:2:17 Pillars 35 B:2:18 Zoisite (tanzanite) 36 B:2:19 Cordierite37 B:2:20 Titanite38 B:2:21 Apatite38 B:2:22 Pyroxene 39 B:2:23 Sillimanite40 B:2:24 Sai Huang Jing 41 B:2:25 Emerald 41 B:2:26 Nephrite jade (Hetian jade) 45 B:2:27 Opal 47 B:2:28 Agate 48 B:2:29 Quartzite Jade 48 B:2:30 Charoite49 B:2:31 rhodonite 50 B:2:32 Turquoise 50 B:2:33 Dushan Jade 51 B:2:34 Lapis lazuli52 B:2:35 Malachite 52 B:2:36 Marble 53 B:2:37 Su Jishi 53 B:2:38 Fluorite 54 B:2:39 Predicate 54 B:2:40 Sodalite 55 B:2:41 Rhodochrosite 56 B:2:42 Pearl 56 B:2:43 Coral 60 Appendix C (informative) Correspondence between main color-causing elements and UV-visible characteristic absorption peaks of common jewelry and jade 62 Reference 63

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 is proposed by the Ministry of Natural Resources of the People's Republic of China: This document is under the jurisdiction of the National Gemstone Standardization Technical Committee (SAC/TC298): This document is drafted by: National Jewelry and Jade Jewelry Inspection Group Co:, Ltd:, Shandong Provincial Institute of Metrology, Anhui Provincial Geological Experiment Research Institute (Hefei Mineral Resources Supervision and Inspection Center of the Ministry of Land and Resources), Sichuan Provincial Product Quality Supervision, Inspection and Testing Institute, Guangdong Jewelry and Jade and Precious Metal Testing Center, Tongji University: The main drafters of this document: Su Jun, Zhu Hongwei, Zhang Jun, Song Zhonghua, Dai Hui, Dai Sulan, Wang Duo, Zhou Zhengyu, Li Haibo, Cheng Youfa, Chen Xiaoming, Zhou Danyi, Wang Feng, Luo Qinfeng, Jin Xiaoting, Ma Tingting, Zhang An, Xu Su, Li Ting, Guo Lianqiao, Lu Jieran, Li Bowen, Shan Guangqi: Jewelry and Jade Identification by Ultraviolet-visible Absorption Spectroscopy

1 Scope

This document describes the method principle, equipment, samples, test procedures, light Spectral analysis and presentation of results: This document is applicable to the identification of jewelry and jade with characteristic absorption by means of ultraviolet-visible absorption spectroscopy:

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 8322 Terminology of Molecular Absorption Spectroscopy GB/T 13966 Terminology for Analytical Instruments GB/T 16552 Names of Jewelry and Jade GB/T 16553 Identification of Jewelry and Jade

3 Terms and Definitions

GB/T 16552, GB/T 16553, GB/T 13966, GB/T 8322 and the following terms and definitions apply to this document: 3:1 Under the radiation of electromagnetic waves in the ultraviolet-visible band, the valence electrons of the internal particles (atoms, ions or molecules) of jewelry and jade have a specific wavelength: Light (energy) is selectively absorbed and transitions between corresponding electronic energy levels to form a spectrum: 3:2 color center colorcenter The selective absorption of ultraviolet-visible light in jewelry and jade makes the crystal lattice defects of jewelry and jade show color: 3:3 chromophoreelement Various chemical elements that cause the color of jewelry jade: Note: mainly transition metal elements (ions), and secondly rare earth and radioactive elements: 3:4 integrating sphere A hollow spherical shell whose inner wall is coated with white diffuse reflection material, and each point of the inner wall has uniform diffuse reflection: 3:5 It is a method to obtain the ultraviolet-visible absorption spectrum of the sample by using the integrating sphere accessory to receive the diffuse reflection light signal of the sample: 3:6 Absorbance The base 10 logarithm of the ratio of incident light intensity to transmitted light intensity can be expressed in A: ......

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