Rapid assay for gold and instrumentation useful therefor

Details Rapid assay for gold and instrumentation useful therefor Rapid assay for gold and instrumentation useful therefor

G - Physics

01

N

G01N 21/64 (2006.01) G01N 21/59 (2006.01) G01N 33/24 (2006.01) G01J 1/16 (2006.01)

Patent

CA 2119134

2119134 9307472 PCTABS00021 A method and apparatus for performing rapid gold analyses, e.g., in soil or rock samples. The method comprises contacting the gold-containing solution with an oxidizing agent, and at least one crown ether; then separating the gold-crown ether complex from the remaining components of the solution; then recovering the gold ions from the gold-crown ether complex; then contacting the resulting gold-containing solution with a label means such as a chromophobe, and thereafter measuring the amount of bound label means in the solution. The apparatus (10, 11) includes an optical source (14) that irradiates a sample complex (12) with incident radiation of a first wavelength, a detector (20) that detects fluoresced light of a second wavelength, a detector (21) that detects transmitted light of the first wavelength, and a detector (15) for detecting the intensity of the source radiation. A processor (46) corrects the detected fluoresced and transmitted light for variations in the intensity of the incident radiation, and separately determines the gold concentration based on the respective corrected fluoresced and transmitted light, and selects which of the two measurements represents the most accurate measure of the gold concentration.

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