[Determination of impurity elements in high purity gold using ICP-AES method after matrix extraction and separation]
1College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|September 10, 2003
Summary
This study introduces a new method for separating trace elements like cadmium and lead from gold using MIBK extraction. The process achieves high recovery rates, ensuring accurate analysis of high-purity gold. Keywords: trace element separation, gold analysis, MIBK extraction.
Area of Science:
- Analytical Chemistry
- Materials Science
Context:
- Accurate quantification of trace impurities in high-purity gold is crucial for material quality control and scientific research.
- Existing separation methods may be inefficient or unsuitable for large gold matrices.
Purpose:
- To develop and validate an efficient extraction system for separating specific trace elements (Cd, Cr, Cu, Fe, Mn, Ni, Pb, Pt) from gold.
- To optimize the extraction process by studying the effect of pH and determining the optimal final measuring solution.
Summary:
- A Methyl Isobutyl Ketone (MIBK) extraction system was developed for separating trace impurities from gold.
- The study investigated the influence of pH on extraction efficiency.
- Optimal conditions yielded a 93.3%-100% recovery rate for trace elements in a 10% hydrochloric acid solution after a single extraction.
Impact:
- Enables precise determination of trace element concentrations (0.1-20 µg/g) in 99.99% pure gold.
- Provides a reliable method for quality control in gold refining and analysis.
- Contributes to advancements in trace element analysis techniques for precious metals.
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