Test and Analysis of the White Substance on the Surface of Gold Jewelry

SHEN Yunfeng; XU Yuewei; FAN Chengxing; WANG Weihua; ZHANG Zhi

doi:10.15964/j.cnki.027jgg.2023.01.007

Volume 25 Issue 1

Jan. 2023

Turn off MathJax

Article Contents

Article Navigation > Journal of Gems & Gemmology > 2023 > 25(1): 52-56

SHEN Yunfeng, XU Yuewei, FAN Chengxing, WANG Weihua, ZHANG Zhi. Test and Analysis of the White Substance on the Surface of Gold Jewelry[J]. Journal of Gems & Gemmology , 2023, 25(1): 52-56. doi: 10.15964/j.cnki.027jgg.2023.01.007

Citation:

SHEN Yunfeng, XU Yuewei, FAN Chengxing, WANG Weihua, ZHANG Zhi. Test and Analysis of the White Substance on the Surface of Gold Jewelry[J]. Journal of Gems & Gemmology , 2023, 25(1): 52-56. doi: 10.15964/j.cnki.027jgg.2023.01.007

Citation:

PDF( 6394 KB)

Test and Analysis of the White Substance on the Surface of Gold Jewelry

doi: 10.15964/j.cnki.027jgg.2023.01.007

SHEN Yunfeng^{1, 2
,},
XU Yuewei^{1, 2},
FAN Chengxing^{1, 2},
WANG Weihua^{1, 2},
ZHANG Zhi^{1, 2}

1.
Beijing Guoshou Gems & Jewellery Testing Co., Ltd., Shenzhen Laboratory, Shenzhen 518020, China
2.
Shenzhen Guoshou Gem & Jewelry Testing Co., Ltd., Shenzhen 518020, China

Received Date: 2022-02-22
Publish Date: 2023-01-31

Abstract

Abstract

The silver-white spots of the gold jewelry were magnified and observed, and the causes of silver-white spot colour were analyzed by X-ray fluorescence spectra and metallographic analysis. The results show that there are obvious osmium (Os) and iridium (Ir) characteristic peaks by X-ray fluorescence spectroscopy, and two metallographic structures different from gold can be observed by metallographic microscope. The purpose of this paper is to improve the detection process of gold jewelry in laboratory, improve the ability of inspectors to identify and analyze characteristic peaks of elements, and provide a basis for rapid identification of this kind of jewelry and prevent it from entering the market through the detection of problematic samples. For gold adulterated products, the laboratory should not issue a certificate or label for the batch of products.
- metallographic analysis,
- osmium (Os),
- iridium (Ir),
- characteristic spectrum

FullText(HTML)

References(11)

References

[1]	全国首饰标准化技术委员会. 金合金首饰金含量的测定灰吹法(火试金法): GB/T 9288-2019[S]. 北京: 中国标准出版社, 2021. National Jewelry Standarization Technical Committee. Gold jewellery alloys-determination of gold-cupellation method (fire assay): GB/T 9288-2019[S]. Beijing: Standards Press of China, 2019. (in Chinese)
[2]	全国首饰标准化技术委员会. 首饰贵金属含量的测定ICP差减法: GB/T 40114-2021[S]. 北京: 中国标准出版社, 2021. National Jewelry Standarization Technical Committee. Determination of precious metals content-Difference method using inductively coupled plasma optical emmission spectroscopy: GB/T 40114-2021[S]. Beijing: Standards Press of China, 2021. (in Chinese)
[3]	全国首饰标准化技术委员会. 首饰贵金属含量的测定X射线荧光光谱法: GB/T 18043-2013[S]. 北京: 中国标准出版社, 2013. National Jewelry Standarization Technical Committee. Jewellery -Determination of precious metal content -Method using X-ray fluorescence spectrometry: GB/T 18043-2013[S]. Beijing: Standards Press of China, 2013. (in Chinese)
[4]	兰延, 赵曼曲, 陈春. 掺铱黄金饰品的特征及检测方法[J]. 宝石和宝石学杂志(中英文), 2006, 8(1): 13-14. https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB200601003.htm Lan Y, Zhao M Q, Chen C. Characteristics of iridium -doped gold jewelry and its determination[J]. Journal of Gems & Gemmology, 2006, 8(1): 13-14. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB200601003.htm
[5]	杨佩, 王浩杰, 陈晓泉, 等. 黄金掺铱制品的金相研究[J]. 贵金属, 2014, 35(S1): 168-170. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ2014S1034.htm Yang P, Wang H J, Chen X Q, et al. Metallographic studies gold-iridium doped products[J]. Precious metals, 2014, 35(S1): 168-170. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ2014S1034.htm
[6]	陈婵, 龙楚, 李雪明. 贵金属饰品检测中几类特殊样品的分析[J]. 贵金属, 2019, 40(2): 64-68. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ201902012.htm Chen C, Long C, Li X M. Analysis of some special samples in precious metal testing[J]. Precious metals, 2019, 40(2): 64-68. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ201902012.htm
[7]	胡丹静, 严雪俊, 张旭, 等. 密闭消解-重量法测定掺铱、锇和钌的黄金饰品中金量[J]. 贵金属, 2019, 40(4): 42-46. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ201904009.htm Hu D X, Yan X J, Zhang X, et al. Determination of gold content in iridium, osmium and ruthenium-doped gold jewelry by reduction gravimetric method[J]. Precious metals, 2019, 40(4): 42-46. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ201904009.htm
[8]	中国国家标准化管理委员会. GB/T 6462-2005金属和氧化物覆盖层厚度测量显微镜法[S]. 北京: 中国标准出版社, 2005. Standardization Administration. GB/T 6462-2005 metallic and oxide coatings-measurement of coating thinckness-microscopical method[S]. Beijing: Standards Press of China, 2005. (in Chinese)
[9]	杨佩, 高亚伟, 陈佳语, 等. 黄金制品表面颜色变化的原因分析及处理方法[J]. 贵金属, 2016, 37(B11): 7. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ2016S1032.htm Yang P, Gao Y W, Chen J Y, et al. Cause analysis and treatment method of surface color change of gold products[J]. Precious Metals, 2016, 37(B11): 7. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ2016S1032.htm
[10]	熊宗国. 锇铱矿资源状况及处理工艺[J]. 贵金属, 1994, 15(3): 6. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ403.011.htm Xiong Z G. Osmium-iridium resource status and processing technology[J]. Precious Metals, 1994, 15(3): 6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GJSZ403.011.htm
[11]	孟萌. 黄金首饰含铱金属的特征及多种辨别方法[A]. //2012年6月建筑科技与管理学术交流会论文集[C]. 2012: 193. Meng M. Characteristics of iridium-containing metal in gold jewelry and various identification methods[A]. //Proceedings of the Academic Exchange Conference on Construction Technology and Management in June 2012[C]. 2012: 193. (in Chinese)