Abstract:

In order to meet the needs of gold mine production and comprehensive research，and according to the serious situation of chemical contamination，the HCl-HNO₃-NH₄HF₂-KClO₃ sealed vessel and Na₂O₂-KOH decomposition of high temperature melting system were established in this study.The Au，Ag，Cu，Pb，Zn，As，Sb，SiO₂，Fe₂O₃，Al₂O₃，CaO，MgO and other 18 kinds of main，trace elements were determinated by atomic absorption spectrometry（FAAS and GF-AAS）and inductively coupled plasma spectrometry（ICP-OES）combined in geological samples.Green chemistry method is simple and it overcomes the problems such as low efficiency of the traditional exposure reagent aqua regia and mixed acid decomposition system utilization，serious environmental pollution，difficult to control the reaction process；Na2O2 combined with KOH can promote the process of ore melting，also will have a certain degree of offset matrix interference，precision（RSD） of the high grade Ag was up to 1.09% in thiourea medium，and chemical yield of the general metallogenic element was around 96%~107%.

Key words: green chemistry method, gold ore geological samples, sealed vessel, multi-metal, trace element