A method for determining the content of gold and other elements in gold alloy products

By dissolving gold alloy samples and constructing a calibration working curve using X-ray fluorescence spectroscopy technology, the accuracy and efficiency issues of determining the gold content and other element contents in gold alloy products are resolved, achieving fast and accurate test results, which is suitable for gold alloy products with complex matrices.

CN116429808BActive Publication Date: 2025-09-26NANJING PRODUCT QUALITY SUPERVISION & INSPECTION INSTITUTE (NANJING QUALITY DEVELOPMENT & ADVANCED TECHNOLOGY APPLICATION RESEARCH INSTITUTE)
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Patent Information

Application Number
CN202310415835.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-18
Publication Date
2025-09-26
Estimated Expiration
2043-04-18

AI Technical Summary

Technical Problem

Existing technologies make it difficult to accurately and quickly determine the gold content and other element contents in gold alloy products, especially high-content impurity elements. Traditional methods are also costly, inaccurate, suffer from severe matrix interference, and lack applicable standard substances.

Method used

Using X-ray fluorescence spectroscopy technology, by dissolving the gold alloy sample and preparing the calibration solution, a high-content coexistence system of constituent elements is established, a calibration working curve is constructed, matrix interference is eliminated, and rapid and accurate determination is achieved.

Benefits of technology

It improves the accuracy and efficiency of determining the content of gold and other elements in gold alloy products, solves the matrix interference and element absorption enhancement effect, is applicable to a wide range of elemental composition, meets market testing needs, and provides testing basis and regulatory support.

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Abstract

The present invention relates to the technical field of element content detection, and in particular to a method for determining the gold content and other element contents in a gold alloy product. The method comprises the following steps: 1) dissolving a sample, adding hydrochloric acid, disodium ethylenediaminetetraacetic acid, tartaric acid, oxalic acid, and perchloric acid to prepare a stable sample solution; 2) preparing a calibration solution composed of the main element contents; 3) measuring calibration samples of gold, silver, copper, zinc, nickel, iron, manganese, and chromium with known concentrations to determine the test conditions for the above elements; and 4) testing the calibration solution samples to construct a calibration working curve showing the relationship between X-ray fluorescence spectrum intensity and the gold, silver, copper, zinc, nickel, iron, manganese, and chromium content. The calibration curve is then used to test the sample to determine the gold, silver, copper, zinc, nickel, iron, manganese, and chromium contents in the gold alloy product to be tested. This method can quickly and accurately determine the gold, silver, copper, zinc, nickel, iron, manganese, and chromium contents in gold alloy products with a gold content of 0.15% to 99.9%.
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