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本文采用410哌啶树脂富集分离金。以2.5—30%的王水或0.5—4mol/L盐酸介质为上柱液,近沸的0.3%硫脲溶液为解吸液最后以原子吸收进行测定。方法快速、简便,用于岩矿中金的测定结果满意。 相似文献
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D301G树脂分离富集超痕量金的研究及应用 总被引:3,自引:0,他引:3
研究了用D3 0 1G大孔弱碱性苯乙烯系阴离子交换树脂对超痕量金的吸附性能。在φ为 1 %~ 2 0 %的王水介质中 ,Au与Cl-形成 [AuCl4]-络阴离子被D3 0 1G树脂吸附。吸附物灰化后 ,灰分与缓冲剂混合均匀 ,全部装入杯形电极进行光谱测定。方法检出限为 0 .0 8× 1 0 -9(1 0g样品 ) ,测定范围在 1~ 2 0 0 0 0ng内P -logC呈线性关系。方法经国家一级标准物质中金的测定验证 ,结果与标准值相符 ,1 2次测定的RSD为 9.1 %~ 1 3 .1 % ,可用于测定水系沉积物中的超痕量金。 相似文献
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异烷基膦酸二丁酯色层柱分离原子吸收法测定矿石中金 总被引:1,自引:0,他引:1
以仿XAD-7吸附树脂为担体,异烷基膦酸二丁酯(5208)为固定相的色层粉,在5%-50%王水和0.5mol/L-6mol/LHCl介质中可定量吸附金,用80℃3g/L硫脲溶液解析后,原子吸收法进行金的测定。 相似文献
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研究了410哌啶树脂对Cd的吸附行为,在2%~20%HCI介质中[CdCl_3] ̄-被树脂吸附,采用4%~30/HNO_3溶液可以解脱Cd,回收率在96%以上。测定了Cd在该树脂上的分配系数为5490,对含Cd0.067μg/g的标样GSR-3平行测定6次,相对标准偏差为9.5%。方法用于化探样品中0.0X×10 ̄-6级Cd的测定,结果满意。 相似文献
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以N263浸渍在DA201大孔吸附树脂上制得了N263浸渍树脂,测定了静态时树脂Pb(Ⅱ)的吸附容量,通过柱层析法,试验了酸度,流速和干扰离子等因素对N263浸渍树脂吸附和洗脱Pb的影响。建立了N263浸渍树脂分离-富集后衔接原子吸收和比色法测定Pb(Ⅱ)的方法,测定了地质样品中Pb(Ⅱ),测试结果理想。 相似文献
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聚酰胺树脂富集分离-光度法连续测定铂和钯 总被引:1,自引:1,他引:1
试验了在柱层析操作条件下,聚酰胺树脂对铂和钯的吸附性能.结果表明,在 0.001~3.5 mol/L的HCl(或王水)介质中,聚酰胺树脂对铂和钯的吸附容量分别为20.92和19.20 mg/g,被酸性硫脲溶液洗脱后,用双十二烷基二硫代乙二酰二胺光度法测定.方法用于矿石中微量铂、钯的富集分离和测定,结果与等离子体发射光谱法及推荐值相符.铂、钯回收率均在93.7%~99.2%,相对误差分别为5.56%和4.44%. 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
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
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引:4,自引:0,他引:4
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
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach 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
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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
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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
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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
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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
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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
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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