Non-Destructive Assaying Gold Jewellery Using Dual-Energy Micro-Computed Tomography

Authors

  • Jaafar Abdullah Centre for Computed Tomography and Industrial Imaging (CCTII), Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor Darul Ehsan, Malaysia
  • Abibullah Samsudin Institute of Research and Consultancy (INPUT) YaPEIM, Tingkat 8, Grand Seasons Avenue, No. 72, Jalan Pahang, 53000 Kuala Lumpur, Malaysia
  • Nor Laili Omar Institute of Research and Consultancy (INPUT) YaPEIM, Tingkat 8, Grand Seasons Avenue, No. 72, Jalan Pahang, 53000 Kuala Lumpur, Malaysia
  • Hafizza Abdul Manan Institute of Research and Consultancy (INPUT) YaPEIM, Tingkat 8, Grand Seasons Avenue, No. 72, Jalan Pahang, 53000 Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.11113/jt.v73.4242

Keywords:

Non-destructive evaluation, gold purity, gold scam prevention, fake gold, X-ray fluorescence, dual-energy X-ray micro-computed tomography, image reconstruction

Abstract

Determining the fineness of gold jewelleries remains one of the most challenging tasks in gold trading. The existing technology of gold testing is inadequate, allowing gold counterfeiting worldwide. The most popular non-destructive method for analysis of gold jewelleries is X-ray fluorescence technique. However, the technique is limited to surface only and it is also greatly influenced by matrix effects. In this paper, dual-energy X-ray micro-computed tomography method was proposed to assay gold jewelleries. Experimental results demonstrated that grey values of reconstructed tomographic images in combination with advanced image analysis procedures could be used to detect fake jewelleries. Due to the uniqueness of X-ray absorption, the technique was also capable of identifying different materials in gold jewelleries. Further analysis on sectioned-earrings samples using X-ray diffraction techniques and visual observation confirmed all tomographic findings.  

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Published

2015-03-18

How to Cite

Non-Destructive Assaying Gold Jewellery Using Dual-Energy Micro-Computed Tomography. (2015). Jurnal Teknologi (Sciences & Engineering), 73(3). https://doi.org/10.11113/jt.v73.4242