应用XRF与ICP-MS研究陨石样品的元素分布

分别采用X射线荧光光谱无标样全定量分析法(XRF)和微波消解/电感耦合等离子体质谱法(ICP-MS)对铁陨石和石陨石样品进行了元素分析。XRF法检测陨石样品中的常量元素，ICP-MS检测陨石中的微量元素。实验结果表明：XRF法可以检测出陨石样品中含量在10 μg·g-1以上的所有金属和非金属元素，得出两类陨石中共同含有的6种常量元素是Fe，Mg，Si，Na，Al和Ca。不同地区的铁陨石中均含有大量的Fe，石陨石中含有大量的Si。ICP-MS法检测陨石中的24种元素，选出共同存在的9种元素V，Ni，Mo，Ag，Sn，La，Gd，Hg和Pb进行对比分析，得出铁陨石中的重金属元素和稀土元素的含量远高于石陨石。所有的铁陨石样品中Sn元素的含量大约是石陨石的10～25倍，铁陨石中稀土元素La和Gd的含量大约是石陨石的6倍，新疆的5A号和6A号铁陨石中Pb的含量比来自山东的铁陨石(1A, 2A, 3A, 4A)多5～13倍，来自内蒙古的石陨石(9B，10B)比来自新疆的石陨石(7B，8B)多了三种元素La，Mo和Gd。

Study on Element Distribution in Meteorite Samples by XRF and ICP-MS

In this paper, X-ray fluorescence spectrometry (XRF), no standard complete quantitative analysis and microwave digestion/inductively coupled plasma mass spectrometry (ICP-MS) were used to perform the elemental analysis of two types of meteorites. Determination of macro-element in meteorite samples by XRF method, and determination of micro-element in meteorite samples by ICP-MS method. Experimental results show that: The XRF method can be used to detect the meteorite samples content in 10 μg·g-1 above all metal and nonmetal elements, it is concluded that the 6 major elements in the two types of meteorites are Fe，Mg，Si，Na，Al，Ca. Iron meteorites in different regions contain large amounts of Fe, stone meteorites contain a large amount of Si . Determination of 24 elements in meteorites by ICP-MS, by comparing and analyzing the 9 elements of V，Ni，Mo，Ag，Sn，La，Gd，Hg，Pb, the content of heavy metals and rare earth elements in iron meteorite is much higher than that in stone meteorite. The content of Sn in all iron meteorite samples is about 10~25 times as much as that in stony meteorites, the contents of rare earth elements La and Gd in iron meteorites are about 6 times as much as those of stony meteorites. The content of Pb in 5A and 6A iron meteorites in Xinjiang is 5~13 times more than that in iron meteorites from Shandong (1A, 2A, 3A, 4A). The stone meteorites from Inner Mongolia (9B, 10B) have more than three elements La，Mo and Gd from the stone meteorites (7B, 8B) from Xinjiang.