The lithium potential in the Aïr massif is represented by mineral index of spodumene pegmatites and, lepidolite pegmatites. The mineral deposits of lithium occur in cluster or veins that cut the host rock or are ...The lithium potential in the Aïr massif is represented by mineral index of spodumene pegmatites and, lepidolite pegmatites. The mineral deposits of lithium occur in cluster or veins that cut the host rock or are located near the contact between the greenstone belt and granitic massif. The evidence of lithium is in the form of clusters or disseminated and stockwerk. Mineralogical characteristics show similarities between the Air Massif pegmatites and indicate the same homogenous source during the magma-generation process. The pegmatite rocks attracted the attention due to their wide exposure and composition, well appearance, and economically hosting of significant rare earth metals such as Sn and W. The mineralogical and petrographical investigations on the eight pegmatites rocks samples observed have a relative similarity, while a little difference in the shapes attributed to the ratio in the pegmatite rocks of the minerals. The occurrence of the kink band indicates the influence of the tectonic processes which affected the Aïr massif after the emplacement of late magmatic or post-magmatic pegmatites by injection into fractured rocks in the upper part of the crust. The Air Massif pegmatite has higher concentrations Li and of all trace elements except Hf and occasionally Zr, Ti, Sn and Mg of for the economic exploration.展开更多
稀土元素会对橡胶的性能造成影响,需加强监控。通过系统分析消解试剂、消解温度以及消解时间等因素对检测分析的影响,对设备工作功率、步距深度、冷却气流速、辅助气流速、雾化气流速等质谱参数进行优化筛选,利用在线内标手段校正基体...稀土元素会对橡胶的性能造成影响,需加强监控。通过系统分析消解试剂、消解温度以及消解时间等因素对检测分析的影响,对设备工作功率、步距深度、冷却气流速、辅助气流速、雾化气流速等质谱参数进行优化筛选,利用在线内标手段校正基体效应和信号漂移等问题,利用微敞开石墨消解技术结合电感耦合等离子体质谱仪,构建了测定天然橡胶制品中16种稀土元素含量的方法。微敞开石墨消解橡胶制品的较优处理条件以6 mL HNO_(3)、1 mL HClO_(4)和4 mL HF为消解试剂,采用三阶程序升温,消解最高温度至180℃,保温180 min。结果表明,稀土元素的检出限为0.0002~0.001 mg/kg,方法加标回收率在71.1%~90.9%,相对标准偏差RSD在3.8%~9.2%,各元素的标准曲线线性关系良好。与传统方法相比,微敞开石墨消解技术操作简便,可按照设定程序自动完成消解全过程,无需单独赶酸,工作效率较高,且具有成本低、检测范围宽、检出限低、处理效率高等优点,适用于橡胶制品中稀土元素的高通量检测。展开更多
文摘The lithium potential in the Aïr massif is represented by mineral index of spodumene pegmatites and, lepidolite pegmatites. The mineral deposits of lithium occur in cluster or veins that cut the host rock or are located near the contact between the greenstone belt and granitic massif. The evidence of lithium is in the form of clusters or disseminated and stockwerk. Mineralogical characteristics show similarities between the Air Massif pegmatites and indicate the same homogenous source during the magma-generation process. The pegmatite rocks attracted the attention due to their wide exposure and composition, well appearance, and economically hosting of significant rare earth metals such as Sn and W. The mineralogical and petrographical investigations on the eight pegmatites rocks samples observed have a relative similarity, while a little difference in the shapes attributed to the ratio in the pegmatite rocks of the minerals. The occurrence of the kink band indicates the influence of the tectonic processes which affected the Aïr massif after the emplacement of late magmatic or post-magmatic pegmatites by injection into fractured rocks in the upper part of the crust. The Air Massif pegmatite has higher concentrations Li and of all trace elements except Hf and occasionally Zr, Ti, Sn and Mg of for the economic exploration.
文摘稀土元素会对橡胶的性能造成影响,需加强监控。通过系统分析消解试剂、消解温度以及消解时间等因素对检测分析的影响,对设备工作功率、步距深度、冷却气流速、辅助气流速、雾化气流速等质谱参数进行优化筛选,利用在线内标手段校正基体效应和信号漂移等问题,利用微敞开石墨消解技术结合电感耦合等离子体质谱仪,构建了测定天然橡胶制品中16种稀土元素含量的方法。微敞开石墨消解橡胶制品的较优处理条件以6 mL HNO_(3)、1 mL HClO_(4)和4 mL HF为消解试剂,采用三阶程序升温,消解最高温度至180℃,保温180 min。结果表明,稀土元素的检出限为0.0002~0.001 mg/kg,方法加标回收率在71.1%~90.9%,相对标准偏差RSD在3.8%~9.2%,各元素的标准曲线线性关系良好。与传统方法相比,微敞开石墨消解技术操作简便,可按照设定程序自动完成消解全过程,无需单独赶酸,工作效率较高,且具有成本低、检测范围宽、检出限低、处理效率高等优点,适用于橡胶制品中稀土元素的高通量检测。
