过氧化钠碱熔-电感耦合等离子体发射光谱法测定多金属矿中的锡钨钛等主次量成分

发布时间：2018-09-07 18:59

【摘要】：准确、快速测定多金属矿中的主次量成分,对矿产资源的综合利用具有十分重要的意义,但针对锡、钨、钛三种元素等难以被酸溶解的元素,选择适宜的样品前处理方法和电感耦合等离子体发射光谱(ICP-OES)技术结合起来,有利于提高准确度和测试效率。本文以过氧化钠为熔剂,样品经高温熔融,盐酸+酒石酸+过氧化氢混合酸提取,结合内标法建立了测定多金属矿中铜铅锌以及锡钨钛等15个主次量成分的分析方法。实验优化了各元素的分析谱线和背景校正模式,系统研究了坩埚、熔剂的选择、铝元素和内标元素的影响,获得方法检出限为7~995μg/g,加标回收率为90.3%~105.0%,精密度(RSD,n=12)为0.8%~6.6%。本方法针对5种不同类型的典型多金属矿,具有不分矿种、前处理步骤相同、多成分同时测定和测试范围宽(40μg/g~25%)的技术特点,尤其对于矿种类型不确定、测定范围在百分含量以上的多金属矿具有优势。
[Abstract]:Accurate and rapid determination of the primary and secondary components in polymetallic ores is of great significance for the comprehensive utilization of mineral resources, but for the elements such as tin, tungsten and titanium, which are difficult to dissolve in acid, The combination of suitable sample pretreatment method and inductively coupled plasma emission spectroscopy (ICP-OES) is beneficial to improve the accuracy and test efficiency. In this paper, sodium peroxide was used as the flux, the sample was melted at high temperature, the mixed acid was extracted by hydrogen peroxide hydrochloride tartrate, combined with the internal standard method, a method for the determination of 15 main and secondary components such as copper, lead, zinc and tin, tungsten and titanium in polymetallic ore was established. The analytical spectral lines and background correction models of each element were optimized, and the influences of crucible, flux selection, aluminum element and internal standard element were studied systematically. The detection limit of the method was 7n995 渭 g / g, the recovery rate was 90.3 渭 g / g, and the precision (RSD,n=12) was 0.8 渭 g / g. This method is aimed at five different types of typical polymetallic ores, which have the technical characteristics of no ore classification, the same pretreatment steps, and the wide range of simultaneous determination and testing (40 渭 g / g ~ 25%) of multi-component, especially for the uncertainty of mineral type. Polymetallic ores with a determination range of more than percentage have advantages.
【作者单位】：河南省有色金属地质勘查总院;河南省有色金属深部找矿勘查技术研究重点实验室;
【基金】：河南省2016年度“两权价款”地质科研项目(豫招2015-1992-3)
【分类号】：TD98;O657.31

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