陕西华阳川铀及多金属矿区钻孔样品稀土元素测定

2019、2020年从陕西华阳川铀及多金属矿区采集的钻孔(ZK2407/ZK3204/ZK2403/ZK5604)岩心样品，经过机械碎样，通过中陕核工业集团综合分析测试有限公司，利用iCAP Q电感耦合等离子体质谱仪，测试华阳川矿区钻孔样品的稀土含量。
样品采自陕西华阳川矿区钻孔岩心，测试称取0.1000g样品于密闭溶样器中，加入1ml氢氟酸，0.5ml硝酸，盖盖并拧紧缸套盖。于185℃保温24h，取出冷却，在电热板上蒸发至干，再加0.5ml硝酸蒸发至干并重复一次，加（1：1）的硝酸5ml加热提取，转入50ml容量瓶中，定至刻度并摇匀。用ICP-MS进行测定。按《地质矿产实验室测试质量管理规范》（DZG 0130-2006）要求进行质量控制。

Core samples from drill holes (ZK2407, ZK3204, ZK2403, ZK5604) collected from the Yanghuachuan Uranium and Polymetallic Mining Area, Shaanxi Province, in 2019 and 2020 were mechanically crushed. The rare earth element (REE) contents of these core samples were then analyzed by China Shaanxi Nuclear Industry Group Comprehensive Analysis and Testing Co., Ltd. using an iCAP Q inductively coupled plasma mass spectrometer (ICP-MS).

For the sample preparation and analytical procedure: 0.1000 g of sample was weighed into a closed dissolution vessel, followed by addition of 1 mL hydrofluoric acid and 0.5 mL nitric acid. The vessel lid was tightened, and the mixture was incubated at 185 °C for 24 hours. After being removed and cooled to room temperature, the solution was evaporated to dryness on a hot plate. Subsequently, 0.5 mL nitric acid was added, and the solution was evaporated to dryness once more; this step was repeated. Next, 5 mL of 1:1 nitric acid was added for heating extraction. The extract was transferred to a 50 mL volumetric flask, diluted to the volume mark with deionized water, and shaken thoroughly. The sample solution was measured using ICP-MS. Quality control was conducted in accordance with the Specification for Quality Management of Testing in Geological and Mineral Laboratories (DZG 0130-2006).