Status and prospect of analytical methods for precious metal in geological sample
LIU Xianglei1,2, SUN Wenjun*1,2, WEN Tianyao1,2, WANG Tengfei1 WANG Kaikai1, LIU Zongchao1
1. The First Institute of Geological and Mineral Resources Survey,Henan Province Geological Exploration Bureau, Luoyang 471023, China; 2. Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province, Luoyang 471023, China
Abstract：Precious metals are rare and key mineral resources with strategic positions. The accurate analysis of precious metal elements in geological samples is of great practical significance for ensuring the safety of national precious metal resources. The current situation and application progress of collection, preparation, decomposition, separation and enrichment and testing of precious metal geological samples in recent years was reviewed and summarized. The commonly used methods in the decomposition of sample, i.e., fire assay and wet decomposition method, were introduced. Moreover, the commonly used methods in separation and enrichment process including coprecipitation, adsorption, extraction, ion-exchange resin method, distillation, and the commonly used methods in testing including spectrophotometry, atomic absorption spectrometry, atomic emission spectrometry, neutron activation and inductively coupled plasma mass spectrometry were also introduced and summarized. The prospect in the analysis of precious metals was forecasted. If the ultra-high temperature and high-pressure sample dissolution technology, which has the advantages of high efficiency, low loss of volatile elements, and easy control of reagent background value, could achieve further development in sampling amount and digestion of complicated ore samples, its combination with inductively coupled plasma mass spectrometry, which has the advantages in simultaneous determination of multi-elements, high sensitivity and high stability, would bring breakthrough progress for the analysis of precious metal elements in geological samples.
刘向磊, 孙文军, 文田耀, 王腾飞, 王凯凯, 刘宗超. 地质样品中贵金属分析方法现状及展望[J]. 冶金分析, 2022, 42(12): 23-35.
LIU Xianglei, SUN Wenjun, WEN Tianyao, WANG Tengfei WANG Kaikai, LIU Zongchao. Status and prospect of analytical methods for precious metal in geological sample. , 2022, 42(12): 23-35.
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