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离子交换分离——离子色谱法测定造币镀液及其废液中氯离子及硫酸根 总被引:3,自引:0,他引:3
提出了用732型阳离子交换树脂分离造币镀镍液中高含量Ni,离子色谱法测定Cl^-及SO4^2-的方法。确定了分离条件。样品经分离后,进入离子色谱仪时Ni的残留浓度≤0.012mg/L,去除率≥99.6%。Cl^-的相对标准偏差为0.32% ̄1.45%,回收率99.0% ̄100.8%;SO4^2-的相对标准偏差为0.45% ̄0.89%(n=4),回收率98.8% ̄101.2%。同一分离柱经多次测定造 相似文献
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在分散度不同的区域内进行区域采样用于水中硫酸根离子的测定,结果令人满意。应用此方法测定硫酸根离子的线性范围为200.0~3000mg/L;进样频率为120次/h;相对标准偏差为1.70% 相似文献
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在分散度不同的区域性内进行区域采样用于水中硫酸根离子的测定。结果令人满意。应用此方法测定硫酸根离子的线性范围200.0~3000mg/L;进样频率为120次/h;相对标准偏差为1.70%。 相似文献
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采用流动注射夹层带进样方式研究了酚红法测定溴的化学条件和流路参数,所建立的方法具有灵敏度高,精密度好,试剂消耗量少和分析速度块的特点,在所选实验条件下,Br的质量浓度为0.2~10.0mg/L时有良好的线性关系,检出限和相对标准偏差(2.0mg/L,Br,n=11)分别为0.11mg/L和0.88%测定速度为60~90/h,对化学试剂KCl和NaCl中的杂质溴进行了测定,加标回收率为95%~105 相似文献
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研究了以咪唑为背景吸收电解质,α羟基异丁酸为络合剂,毛细管离子电泳分离,间接紫外光度法测定镍矿石中Ni、Co、Cu含量。考察了背景电解质的pH值、α羟基异丁酸(αHIBA)和咪唑浓度对Fe3+、Co2+、Ni2+、Zn2+、Cu2+分离的影响。在优化的条件下,几种离子在8min内完成分离,检测限低至0.2mg/L。以Zn作内标,改善了方法的精密度,对于20mg/L各离子峰面积的相对标准偏差(RSD,n=9)<6.5%。采用内标标准曲线法对镍矿样中Ni、Co、Cu的含量进行了测定,线性范围分别在0.5~80mg/LNi2+和Co2+,5~80mg/LCu2+,结果与其它方法一致。 相似文献
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在线液—淬萃取微型万用分相器的设计和应用Ⅲ.流动注射液—液萃取—电感耦合等离子体原子发射光谱测定矿石中钼和钨 总被引:1,自引:0,他引:1
设计的在线液-液萃取分相器及相应流路系统与电感耦合等离子本原子发射光谱联用具有良好的分析性能。用于测定地质样品中的Mo和W,检出限(3σ)分别为3.6μg/L和28μg/L,两元素在0 ̄2mg/L有良好的线性。由于1mg/L的MoW的测定,RSD(n=7)分别为4.0%和2.7%,测定速率为25 ̄30/h。 相似文献
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饮料中苯甲酸在浓酸和浓硫酸作用下,其消化产物于PH10.0的NH4OH-NH4Cl缓冲溶液中,在导数示波极谱仪上有一灵敏的吸附还原波。峰电位为-0.31V,峰电流与浓度在0.05-5.0mg/L范围内成正比,检测限为0.017mg/L。用本法测定四种饮料中苯甲酸含量,与气相色谱法测定结果基本一致,并对消化产物极谱波质进行讨论。 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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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
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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
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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
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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
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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
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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