XRF和ICP-MS测定风成沉积铜镍锌等9种重金属元素的对比分析  

Comparative Study of Nine Heavy Metal Elements Including Copper,Niccolum and Zinc in Eolian Deposits Analyzed by XRF and ICP-MS

作　　者：曾方明[1,2] 詹涛 陈陵康 ZENG Fangming;ZHAN Tao;CHEN Lingkang(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes,Xining,810008,China;Natural Resources Survey Institute of Heilongjiang Province,Harbin,150036,China;Faculty of Science,Guangdong University of Petrochemical Technology,Maoming,525000,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖地质与环境重点实验室,青海西宁810008 [3]黑龙江省自然资源调查院,黑龙江哈尔滨150036 [4]广东石油化工学院理学院,广东茂名525000

出　　处：《盐湖研究》2024年第2期9-16,共8页Journal of Salt Lake Research

基　　金：国家自然科学基金项目(U20A2078,41402314,41967038);广东省自然科学基金(2021A1515011487)。

摘　　要：风成沉积的重金属元素对生态环境变化具有指示意义,因此快速、准确地测定其含量显得特别重要。目前,主要通过XRF(X射线荧光光谱)和ICP-MS(电感耦合等离子体质谱)方法测定重金属元素的含量。文章对四个风成沉积剖面(黄土高原西峰剖面,青藏高原东北部种羊场剖面、泉吉河剖面、依毛剖面)247件样品进行了XRF和ICP-MS分析,并对其中9种重金属元素的含量进行了初步对比分析。结果表明:1. Cu、Ni、Zn的XRF测试结果和ICP-MS测试结果高度一致(Pearson相关系数r大于0.84)。2. Co、Pb的XRF测试结果和ICP-MS测试结果在大多数剖面中具有较好的一致性,但在个别剖面中的一致性较差。3.在种羊场和泉吉河剖面中,Th的XRF测试结果比ICP-MS的测试结果略低。两种方法测得的As的含量在四个剖面中随深度的变化趋势高度一致;As的XRF测试结果明显比ICP-MS的测试结果低,差值可达11.5μg/g(相对于XRF法测定值的变化幅度达214%)。4. Cr和T的XRF测试结果高于ICP-MS的测试结果,两种方法测得的Cr含量的差值达40μg/g。尽管ICP-MS法具有比XRF法更高的精度,但对于Cu、Ni、Zn,采用高效廉价的XRF法能得到与ICP-MS法相媲美的测试结果。5.西峰、种羊场剖面采用XRF法测得的Cu、Ni、Zn、As含量与磁化率呈现相似的变化,表明这些元素亦可指示风成沉积记录的气候环境变化。Heavy metal elements in eolian deposits preserve a lot of information about the situations of environmental pollution and even environmental and climatic change.Thus,accurate and rapid determination of heavy metal element contents in eolian deposits is essential for studying the above questions.To date,XRF(X-ray fluorescence spectrometry)and ICP-MS(inductively coupled plasma mass spectrometry)methods are mainly utilized to determine the content of heavy metal elements in eolian deposits.However,comparative analysis of the heavy metal elements in the eolian deposit samples analyzed by the above two methods is still scarce.Here,we conducted XRF and ICP-MS analyses on 247 samples of four typical eolian-deposit sections on the central Chinese Loess Plateau(XF section)and the northeastern Qinghai-Xizang Plateau(ZYC section,QJH section,and YM section).The contents of nine heavy metal elements including copper,niccolum and zinc were compared and discussed.The preliminary results show that:(1)Results of Cu,Ni,and Zn analyzed by both XRF and ICP-MS methods are of good consistency,and the variations of Cu,Ni and Zn contents measured by both methods varying with the depth of the section are highly consistent(Pearson’s correlation coefficient r is greater than 0.84).(2)Variations of Co and Pb analyzed by both methods are consistent in most studied sections,but there are inconsistencies in some sections.(3)In the ZYC and QJH sections,Th contents determined by the XRF are slightly lower than those tested by the ICPMS method.The trend variations of arsenic(As)contents in four studied sections analyzed by both methods are highly consistent.Contents of As tested by the XRF method are significantly lower than those tested by the ICP-MS method,and the difference is up to about 11.5μg/g,with changing amplitude of about 214%when compared with the measured value of XRF method.(4)Cr and T contents tested by the XRF method are higher than those determined by the ICP-MS method;the difference of Cr content measured by the two methods c

关 键 词：重金属元素 XRF 风成沉积 黄土高原 青藏高原 

分 类 号：P595[天文地球—地球化学] P534.63[天文地球—地质学]