灰化法与微波消解法处理地电化学泡塑样品的分析效果对比研究

发布时间：2018-03-29 14:43

  本文选题：地电化学　切入点：泡塑样品　出处：《岩矿测试》2016年03期

【摘要】：当前普遍使用灰化法对地电化学泡塑样品进行预处理,但可能存在高温下某些元素(如Hg、As)挥发损失的缺点。本文选择了内蒙古洛恪顿热液型铅锌多金属矿床一条地电化学勘查剖面,开展灰化法及微波消解法处理地电化学泡塑样品的勘查效果对比研究,采用原子荧光光谱和高分辨电感耦合等离子体质谱测定其中的主要元素。结果表明:1对于Zn、Cu、Fe、La等十余种元素,两种处理方法取得的异常模式基本一致,可根据实际工作需求任选一种方法进行样品预处理;2对于Au、Pb等元素,微波消解法因为取样量小,可能存在较严重的样品均匀性、代表性及分析检出限等问题,应采用灰化法;3对于Hg,灰化法存在显著的元素损失,更适合采用微波消解法;4对于As,两种方法均存在较大问题,建议参考植物样品尝试使用硝酸及高氯酸直接溶解等方法进行预处理。
[Abstract]:At present, ashing method is widely used to pretreat geoelectrochemical foam samples. However, there may be the disadvantage of volatilization loss of some elements (such as Hgn As) at high temperature. In this paper, a geoelectrochemical prospecting section of Luokedun hydrothermal Pb-Zn polymetallic deposit in Inner Mongolia has been selected. A comparative study on the exploration results of geoelectrochemical foam samples treated by ashing method and microwave digestion method was carried out. Atomic fluorescence spectroscopy and high resolution inductively coupled plasma-mass spectrometry were used to determine the main elements. The results show that the abnormal modes obtained by the two methods are basically the same for more than ten elements, such as ZnCU, Fe, La and so on. According to the actual work demand, we can choose a method to pretreat the sample. For the elements such as Au-Pb, the microwave digestion method may have some serious problems such as sample uniformity, representativeness and analysis detection limit because of the small sample size. For Hg, the ashing method should have significant element loss, and it is more suitable to use microwave digestion method for As. there are some problems in both methods. It is suggested that direct dissolution of nitric acid and perchloric acid should be used to pretreat plant samples.
【作者单位】： 中国地质大学(北京)地球科学与资源学院;中国地质科学院地球物理地球化学勘查研究所;国土资源部地球化学勘查技术重点实验室;
【基金】：中国地质调查局地质矿产调查评价项目“东乌旗整装勘查区热磁与地电化学方法技术研究应用”(12120113100400)和“勘查地球化学特殊样品分析新方法新技术应用研究”(1212011120278)
【分类号】：P632
，

本文编号：1681593