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