共查询到20条相似文献，搜索用时 125 毫秒
1.
在王水介质中，硫脲纤维素吸附痕量钯，不受地质样品中普通离子的干扰。吸附的钯用硫脲溶液解脱并用ＦＡＡＳ法测定。研究了分离测定条件并成功用于测定地质样品中的痕量钯。 相似文献
2.
介绍了地质年龄测定中对高Ｒｂ／Ｓｒ样品，用吸附了六硝基二苯胺的阴离子交换树脂除去部分铷元素的新方法，从而实现样品在阳离子交换柱上的铷锶安全分离。该方法可解决Ｒｂ／Ｓｒ〉２０样品在质谱分析测定中＾８７Ｒｂ干扰＾８７Ｓ的问题。 相似文献
3.
在酸性体系下溶样，５０６硫脲盐阴离子交换树脂分离Ａｕ等干扰组分。拟定了含Ａｕ地质样品中测定微量锡的氢化物－原子荧光分析法。方法检出限〈１×１０＾－６。 相似文献
4.
介绍了地质年龄测定中对高Ｒｂ／Ｓｒ样品，用吸附了六硝基二苯胺的阴离子交换树脂除去部分铷元素的新方法，从而实现样品在阳离子交换柱上的铷锶完全分离。该方法可解决Ｒｂ／Ｓｒ＞２０样品在质谱分析测定中￣（８７）Ｒｂ干扰￣（８７）Ｓｒ的问题。文章中对Ｒｂ／Ｓｒ＞２０的地质样品部分除铷法与其它方法进行了对照测试，结果一致。部分除铷法比其它方法具有节省时间、操作简便的优点 相似文献
5.
6.
文中阐述并归纳了近年地质样品中铂族元素的分离、富集及测试方法方面的最新进展。铂族元素本身的超痕量性,要求实验过程中对空白值的控制,干扰元素的扣除和检测限的降低更为严格,同时要克服块金效应。文中对消解过程中常用的火试金法、酸溶、碱熔方法和卡洛斯管法(Carius tube),分离富集过程中的Te共沉淀和离子交换法,测试手段中的原子光谱法、中子活化法和等离子质谱法等方法的最新进展进行了总结。由于复杂的地质样品中PGE的浓度范围不一、赋存形式多样,要求在具体样品分析过程中灵活地搭配使用各种分离富集和检测方法,结合笔者所在实验室在实验过程中发现的问题,对各种不同类型地质样品中铂族元素的分离富集、样品处理及测定方法也进行了总结。 相似文献
7.
8.
探针原子化石墨炉原子吸收法直接测定地质样品中的微量铋 总被引：1，自引：0，他引：1
本文介绍一种石墨探针原子化测定地质样品中微量铋的方法。方法是在加热炉温恒定的石墨炉中,插入自制的附有干燥样品的石墨探针,使样品在恒温下蒸发和解离,避免了严重的气相干扰。可不经分离直接测定地质样品中的铋,抗干扰能力优于普通石墨炉原子化方法。灵敏度为3.4×10~(-11)g(1％A),可测定0.0xg/t以上的铋。 相似文献
9.
报道了Ｐ５０７－ｐＭＢＰ溶剂浸渍滤纸（ＳＩＦＰ）的制备及其吸附性质；提出含微量Ｚｒ、Ｈｆ的岩矿样品经碱熔分解后用强阳离子交换树脂静态吸附分离大量干扰元素，再用Ｐ５０７－ＰＭＢＰＳＩＦＰ富集Ｚｒ与Ｈｆ，然后用ＸＲＦ光谱直接测定ＳＩＦＰ上Ｚｒ、Ｈｆ的方法；考察了阳离子交换树脂分离干扰元素的条件，以及在残留干扰元素存在下Ｐ５０７－ＰＭＢＰＳＩＦＰ对Ｚｒ、Ｈｆ的富集情况等；对分析误差的来源，样品分析的精密度，ＳＩＦＰ样片的稳定性等也进行了讨论；所拟方法经用ＧＳＲ及ＧＳＳ系列部分地质标准样品分析验证，其结果与推荐值符合。 相似文献
10.
金在地壳中的平均含量为5×10-7%。不同岩性的样品含金不一,有的甚至低于1×10-7%。地质试样中多以自然金存在,粒度不等,形态不一,通过200目筛的分析样品的均匀性不够理想。取样少代表性不足,取样多金的提取分离又不易完全。因而地质试样中微量金的测定一直是无机分析中较难解决的课题之一。 相似文献
11.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
12.
Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
13.
正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
14.
正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
15.
16.
正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
17.
正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
18.
正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
19.
正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献
20.
正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.) 相似文献