Rapid synthesis determination of gold in gold jewelry alloys

DOI

10.2991/asei-15.2015.74How to use a DOI?

Keywords

gold jewelry, EDXRF, density, nondestructive determination, rapid

Abstract

The nondestructive determination of Au in gold jewelry mainly takes density testing and X ray fluorescence spectrometer with energy dispersion (EDXRF). Density testing cannot detect gold jewelry alloy and demands that the jewelry shape is simple, while EDXRF is poor in penetration depth, which only can test on the sample surface and small area. This paper using the system programming controlled the vacuum system, the electronic balance, and EDXRF, and compared determination of Au by EDXRF(wXAu) with the one by fire assay(wAu) and the actual density ( ) by density testing with the theoretical density( x) calculated by the mathematical relationship between the crystallographic parameters and the content of gold and impurities for the samples. The results show while x- / x (X) is less than 0.4%, the equation of y (wXAu-wAu) = 0.4421x2+1.2534 0.0835 may correct for determination of Au by EDXREF, so create a set of testing device and provide an effective method for rapid determination of Au in gold jewelry, which can test simultaneously a mass of samples, and solve the disadvantages of density testing and EDXRF.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hui Li
AU  - Xuan Wang
AU  - Yong Zhu
AU  - Youjian Wang
PY  - 2015/05
DA  - 2015/05
TI  - Rapid synthesis determination of gold in gold jewelry alloys
BT  - Proceedings of the 2015 International conference on Applied Science and Engineering Innovation
PB  - Atlantis Press
SP  - 344
EP  - 350
SN  - 2352-5401
UR  - https://doi.org/10.2991/asei-15.2015.74
DO  - 10.2991/asei-15.2015.74
ID  - Li2015/05
ER  -