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1.
周丽沂  张勤 《岩矿测试》1995,14(1):45-48
在0.2mol/L HCl-1.0mol/LNaCl-0.15mol/L抗坏血酸介质中,用电流氧化微分溶出计时电位法直接测定地质物料中微量Cu。富集电位-0.55V,时间20~40s;电极转速2500r/min;溶出电流0.2~1μA;记录电位范围-0.2~-1.20V;清洗电位-0.10V,时间10s。方法检出限0.2μg/g,线性范围2~400ng/ml,精密度(RSD,n=11,4.1μg/  相似文献   

2.
建立了一种连续测定As、Sb、Bi、Hg四元素的方法,对测汞用还原剂及几种测量体系进行了比较,采用对原子化器适当加温的无火焰原子荧光法测汞,以KMnO4消除Te、Se对汞测定的干扰。本方法As、Sb、Bi、Hg四元素的检出限分别为2.01×10^-10g/ml1.56×10^-10g/ml、2.98×106-10g/ml;4.2×10^-11g/ml;对GSSI平行测定11欠,Hg的标准偏差为2.  相似文献   

3.
发展了一种可在野外快速测定0.010—50μg/g银量的新方法。此法由两个各自独立而又配套的部分组成。一是直接测定0.25—50μg/g银量的Ag-TMK-SDS三元络合物光导比色测定法;二是测定0.010—0.25μg/g银量的巯基棉分离富集微珠析出比色法。可在同一份试液中依次完成。前者检出限为0.006μg/ml(K=3);测定铜、铅和锌矿石标样GSO-Cu-1(含银3.87μg/g)、GSO-Ph-1(含银14.7μg/g)和GSO-Zn-1(含银13.5μg/g)中的银,RDS(n=11)分别为1.6%、3.7%和3.4%;后法可检出5ng/g银;测定地球化学标样GSD-3(含银0.59μg/g)中的银,RSD(n=11)为6.t%。方法较为简便、快速、准确和灵敏。用光导比色计测定,结果准确度、精度均有较大改善,且与室内原子吸收法相当。故所定方法具有广阔的应用前景。  相似文献   

4.
流动注射-原子荧光法测定岩矿中痕量硒和碲   总被引:4,自引:0,他引:4  
讨论了题示方法中的干扰,指出在一般岩石中多数共存元素不干扰Se和Te的测定;Cu的干扰可在含Fe ̄3+、HClO_4的介质中加入邻菲罗啉沉淀预先消除;Pb的干扰可在H_2SO_4分解试样时形成PbSO_4消除;试液保存在塑料容器中可免除残留F ̄-的影响。所拟方法每次采样1mL,每小时测定90次。对Se和Te的检出限均为0.2μg/L,测定浓度为10μg/L的Se和Te,其RSD(n=12)分别为3.7%和4.3%。经标样分析验证,方法可行。  相似文献   

5.
王万美  郑民奇 《岩矿测试》1994,13(2):125-127
样品经HNO3-HF-HCLO4分解发,在5.4mol/L的HCl介质中,以抗坏血酸为还原剂用甲基异丁基甲酮同时萃取样品中的Se,Te.c Pd和Ni作混合基体改进剂,使用自制的涂锆石墨平台直接测定有机相中的Se,Te。方法的检出限分别为0.21×10^-9gSe,0.13×10^-9gTe;测定0.06μgSE、0.03μgTe的RSD(n=11)分别为7.0%和8.9%。  相似文献   

6.
尹明  符廷发 《岩矿测试》1993,12(4):246-250
文章报道了用感耦等离子体质谱法测定高纯氧化钪中15个痕量稀土杂质的研究,考察了测定中的各种干扰和影响因素,选择Cs为内标元素补颈体抑制效应和灵敏度漂移。各稀土元素的检出限在0.005-0.027ng/ml范围,标准加入回收率为94.5%-103.7%,精密度为0.85%-1.95%,称取10mg样品,酸溶解后可直接测定高纯氧化钪中总量低于2μg/g的15个稀土杂质。  相似文献   

7.
合成了二安替比林基-(3-溴)苯基甲烷。在Mn和吐温-80存在下,Ce与DAmBM反应生成有色化合物,λmax为380ε为3.0×10^5L.mol^-1,cm^-1。Ce量在(0-10)μg/25ml间符合比尔定律。  相似文献   

8.
氢化物—原子荧光法测定岩石中痕量硒的干扰及消除   总被引:12,自引:10,他引:12  
张锦茂  范凡 《岩矿测试》1993,12(4):264-267
用HF-HClO4-HNO3混合酸分解样品,采用Fe^3+作释放剂,研究了不同量的Fe^3+与HCl酸度对Se荧光强度的影响和干扰离子消除的效果,以及Fe^3+存在Te存在下对Se测定的影响。方法的检出限为0.01μg/g.样品中Se量为0.1μg/g的相对标准偏差(n=11)是5.4%。用于岩石标样中痕量Se的测定,结果较好。  相似文献   

9.
李素芝  熊采华 《岩矿测试》2000,19(3):205-208
拟定了电感耦合等离子体原子发射光谱(ICP-AES)测定铅锑合金中As、Bi、Ca、Cd、Co、Fe、Mn、Se和Zn等九个元素的分析方法,考察了Pb、Sb基体对待测元素的干扰情况。样品以HNO3分解,酒石酸抑制Sb水解,ICP-AES同时测定多元素。方法对各元素的测定限在0.07~5.2μg/g,相对标准偏差(n=8)为0.78%~25.5%,加标回收率均大于86%,经与原子吸收光谱法和原子荧光  相似文献   

10.
样品经HNO_3-HF-HClO_4分解,在5.4mol/L的HCl介质中,以抗坏血酸为还原剂用甲基异丁基甲酮同时萃取样品中的Se、Te。以Pd和Ni作混合基体改进剂,使用自制的涂锆石墨平台直接测定有机相中的Se、Te。方法的检出限分别为0.21×10 ̄(-9)gSe,0.13×10 ̄(-9)gTe;测定0.06gSe、0.03gTe的RSD(n=11)分别为7.0%和8.9%。  相似文献   

11.
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.
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.
HYDROGEOLOGY     
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.
GEOCHEMISTRY     
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   

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