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1.
罗丹宁纤维富集分离—示波极谱法测定地质样品中的金   总被引:2,自引:0,他引:2  
雷丽莉  邓玉强 《岩矿测试》1995,14(4):281-284
考察了螯合罗丹宁纤维富集分离-示波极谱法测定Au的条件,选用0.15g罗丹宁纤维装柱富集Au,吸附Au后的罗丹宁纤维于700℃灰化灼烧,浸取物在NaOH底液中用示波极谱法测定。  相似文献   

2.
将锍试金改成小锍试金,用小锍扣捕集法把分解样品同富集贵金属与分离基体成份结合在一起进行,炼得的锍扣经酸处理除去贱金属硫化物,富集的贵金属采用无火焰原子吸收光谱测定。取一份样可以测定Au、Pt、Rh和Pd。测定方法的特征质量(g):Au1.1×10 ̄(-11),Pt1.3×1O ̄(-10),Pd1.3×10 ̄(-11),Rh1.2×10 ̄(-11);线性范围(g/ml):Au0~0.040,Pd和Rh为0~0.050,Pt为0~0.50。方法用于超基性岩标样的测定,结果与推荐值相符。  相似文献   

3.
刘家欣 《岩矿测试》1994,13(3):195-197
在0.13mo1/LN_2SO_4及8%丙酮介质中,p(Ⅴ)-Sb(Ⅲ)-W(Ⅵ)三元杂多酸在示波极谱仪上产生一良好的吸附还原波。峰电位为一0.52V(υs.SCE),峰电流(导数波高)与P浓度在8.0×10 ̄(-7)~2.0×10 ̄(-5)mol/L范围内呈线性关系,检测下限为2.0×10 ̄(-7)mol/L。对极谱波的性质进行了探讨,用该法测定了钢标样中的微量P,结果与推荐值相符。  相似文献   

4.
单扫描示波极谱法测定痕量钒   总被引:3,自引:0,他引:3  
提出单扫描示波极谱测定痕量V的极谱催化波体系,选定4.8×10 ̄-6mol/L PAR-0.048%H_2O_2-0.025mol/LNaBrO_3-0.003mol/LH_2SO_4的底液条件,测定V的线性范围为0.04~12ng/ml,检出限0.02ng/ml。将该体系应用于水样、人发及矿样中痕量V的测定,结果满意。  相似文献   

5.
薛光 《岩矿测试》1995,(1):72-74
在10%HCI介质中,采用二苯硫脲(DPTU)-甲基异丁酮(MIBK)泡沫塑料富集,以金试剂液珠萃取比色法测定了化探样品中的Au和Ag。方法的检出限:Au0.5×10 ̄-9;As5×10 ̄-9(10g称样)。利用此方法制备了“野外快速分析箱”,可在野外简陋条件下进行现场测定。  相似文献   

6.
研究了用钼酸铵浸渍处理石墨管、石墨炉原子吸比法测定镓、铟和铊的最挂条件。实验证明,采用硝酸—氢氟酸—硫酸体系溶解样品,涂钼石墨管直接测定样品中的镓、铟和铊,能有效地避免它们在原子化之前以氧化物形式挥发的损失,减少了测定干扰,提高测定的灵敏度。对6个地质标样的测定结果是满意的。木法对镓、铟和铊的检测下限分别为0.9×10 ̄(-11)g,1.7×10 ̄(-11)g和6.2×10 ̄(-11)g;相对标准偏差分别为1.4%、4.8%和3.0%。  相似文献   

7.
小试金富集—示波极谱法测定地质物料中超痕量铂   总被引:3,自引:0,他引:3  
王虎  林玉南 《地质实验室》1997,13(3):195-197
用小试金富集,示波极谱法测定地质物料中10^-11级Pt。首先用灰吹预富集10g物料中的Pt于1mg的银闰中,将合粒溶解,用示波极谱法测定。方法检出限为0.01ng/ml,线性范围为0.1-30ng/5ml,标准回收89-102%。峰电位-0.95V。方法快速、简便,适用于地质物料分析。  相似文献   

8.
在pH4.0的HAc-NaAc介质中,Pb(Ⅱ)与1-苯基-3-基-4-苯甲酰基-吡啉酮-5(PMBN)生成络合物,于一0.56V(vs.SCE)处出现一尖锐、灵敏的极谱峰。Pb浓度在4.83×l0 ̄-9~1.69×10 ̄-6mol/L与峰高呈线性关系。用多种电化学方法研究了极谱波的性质及反应机理,证明-0.56V处的极谱波为络合物吸附波,峰电流由中心离子Pb(Ⅲ)还原产生。用直线法测得络合物组成比为l:l。试验了30多种离子对峰电流的影响。方法已用于矿石中痕量pb的测定。  相似文献   

9.
彭苏文 《岩矿测试》1996,15(2):129-134
探讨了加热柱芯电极的蒸发和激发过程。利用ZnO为载体,Fe_2O_3作增强剂,MgO作稳定剂,碘溶液作卤化剂,样品不需化学预富集,使测金的检出限达到1:5万化探扫面要求,同时还可测定砷、铋、锑。各元素检出限分别为:1.l×l0-9Au,lx10-6As,0.l×l0-6Bi,2×l0-6Sb,试样分析的RSD(n=10)在4.2%~19.8%范围,质量符合要求。  相似文献   

10.
张佩瑜  彭红卫 《岩矿测试》1994,13(2):96-100
对固体悬浮液直接进样及石墨炉原子吸收光谱法测定Ga和Tl进行了研究,拟定了以琼脂为悬浮剂,Ni(对Ga)和V(对Tl)为基体改进剂,标准溶液进行校准的、灵敏、快速、准确测定Ga和Tl的方法。在选定条件下,测得Ga和Tl的特征量(1%吸收)分别为2.8×10 ̄(-11)g和4.4×10 ̄(-11)g,检出限(3σ)分别为24pg和28pg,相对标准偏差分别为6.3%(含Ga6.4g/g,n=11)和4.8%(含Tl1.0g/g,n=13)。方法适用于地质样品中低至0.1g/gGa和Tl的测定。  相似文献   

11.
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.  相似文献   

12.
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   

13.
Robert L. Linnen   《Lithos》2005,80(1-4):267-280
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.  相似文献   

14.
15.
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   

16.
正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)  相似文献   

17.
正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,  相似文献   

18.
正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)  相似文献   

19.
正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-  相似文献   

20.
正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with  相似文献   

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