Improved method for rapid analysis of gold
A high-resolution, target element technology, applied in the field of improvement for rapid gold analysis, can solve problems such as large errors corresponding to gold content, and achieve the effect of reducing errors and optimizing accuracy
Active Publication Date: 2017-12-26
澳洲快索有限公司
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Problems solved by technology
If not corrected, this would lead to a correspondingly large error in the estimated gold content of the sample
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[0046] The described embodiments generally relate to improved methods for the analysis of mineral ore, specifically the determination of the concentration of gold in a sample.
[0047] Detailed implementations are disclosed in sections covering the method, the selection of reference elements, and the subsequent equipment capable of determining the concentration of the target element (gold) in the sample.
[0048] method
[0049] The method of γ-activation analysis relies on the ability to attenuate gold-isomers of γ-ray N γ(Au) The measured quantity is accurately correlated back to the gold concentration c of the sample. The equation related to these two values is:
[0050]
[0051] among them:
[0052] N γ(Au) Is the measured amount of gold-isomer attenuated gamma rays;
[0053] N Au =M s_Au / m Au Is the number of gold atoms in the sample, where M s_Au Is the mass of gold in the sample, and m Au Is the mass of gold atoms;
[0054] Is a sample from the source (Xrays / cm 2 / s) the a...
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Abstract
A method of determining the concentration of a target element in a sample is provided. The method comprises: (i) positioning a sample comprising an element of interest relative to a reference material comprising a reference element, (ii) simultaneously irradiating the sample and the reference material with bremsstrahlung X-rays to thereby irradiate in the generating activated nuclei in the target element and generating activated nuclei in said reference element, (iii) detecting passivated gamma-rays from said irradiated sample and passivated gamma-rays from said irradiated reference material, (iv ) determining a first amount of detected inactivated gamma-rays from the irradiated sample and a second amount of detected inactivated gamma-rays from the reference material, and (v) said second amount of detected inactivated gamma-rays of said reference material is normalized to said first amount of detected inactivated gamma-rays from said irradiated sample to determine in said sample The concentration of the target element. The cross-sectional ratio of the reference element to the target element varies by less than a predetermined measurement accuracy over the range of electron beam energies.
Description
Technical field [0001] The present invention relates to an improved method for determining the concentration of target elements in a sample. In certain instances, an improved method of determining the concentration of gold in a sample is provided. Background technique [0002] During the exploration and mining of mineral deposits, especially gold and platinum group metal deposits, ore sampling is a particularly difficult problem because such elements are extremely irregularly distributed in nature and their corresponding amounts are very small. Therefore, an analytical method capable of determining such elements in a sufficiently large sample with high sensitivity is required. [0003] Pyroassay has been the industry standard for the evaluation of most mineral deposits and has been the method of choice for gold analysis. However, the process requires complex sample preparation, which is very labor-intensive because most of the steps in the method occur in crucibles and ash dishes...
Claims
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IPC IPC(8): G01N23/223G21G1/12G01T1/24G01T1/34
CPCG21G1/12G01N2223/616G01N23/221G01N23/223G01T1/24A61B6/4258G01N23/2208G01N2223/07G01N2223/072G01N2223/074G01N2223/1016G01N2223/3037
Inventor J·蒂克纳格雷格·罗奇
Owner 澳洲快索有限公司