Patent ID: 9188531
Filing Date: 2015-11-17
Classification: G01J,G01N

Abstract:
1. A method for detecting gold in a material sample, the method comprising: illuminating the material sample with light in a first preselected wavelength range, a second preselected wavelength range, and a third preselected wavelength range, wherein each of the first preselected wavelength, the second preselected wavelength and the third preselected wavelength are mutually distinct; detecting the light reflected by the material sample in the first, second and third preselected wavelength ranges; and determining, using a processor, presence of gold in the material sample based on comparing relative intensity of the reflected light in the second preselected wavelength range to the reflected light in the first preselected wavelength range, and relative intensity of the reflected light in the third preselected wavelength range to intensity of the reflected light in the first and second preselected wavelength ranges.