共查询到20条相似文献，搜索用时 62 毫秒
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钛—邻氯苯基荧光酮—Trutib X—100显色反应的研究及微量钛的测定 总被引：2，自引：0，他引：2
本文研究了在非离子表面活性剂Ｔｒｉｔｏｎｘ－１００存在的情况下，邻氯苯基荧光酮（Ｏ－Ｃｌ－ＰＦ）与钛的显色反应。试验表明，在０．１０～０．１４ｍｏｌ·Ｌ￣（－１）Ｈ＿２ＳＯ＿４介质中，Ｏ－Ｃｌ－ＰＦ与钛形成灵敏度极高的红紫色配合物，其最大吸收峰位于５４０ｎｍ处，表现摩尔吸光系数为１．８×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），钛含量在０～３μｇ／２５ｍｌ范围内服从比尔定律。该方法用样少，操作简便，灵敏度高，选择性好，适于测定地质样品中的微量钛。 相似文献
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2-〔2-(6-甲基苯并噻唑)偶氮〕-5-二乙氨基苯甲酸与钴的显色反应及其应用 总被引：4，自引：0，他引：4
在十二烷基硫酸钠存在下，于ｐＨ４．８￣７．４的缓冲溶液中，２－〔２－（６－甲基苯并噻唑）偶氮〕－５－二乙氨基苯甲酸（６－Ｍｅ－ＢＴＡＥＢ）与Ｃｏ（Ⅱ）发生显色反应，形成稳定的蓝紫色络合物，其组成为ｎＣｏ（Ⅱ）：ｎ６－Ｍｅ－ＢＴＡＥＢ＝１：２，最大吸收波长为６５０ｎｍ，ε为１．３８×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｃｏ（Ⅱ）质量浓度在０￣０．３２ｍｇ／Ｌ时服从比尔定律。方法可直接用于维生素Ｂ１ 相似文献
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5‘—硝基水杨基荧光酮与锆显色反应及其应用 总被引：8，自引：0，他引：8
在０．０８￣０．１０ｍｏｌ／Ｌ ＨＣｌ介质中，溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，Ｚｒ（Ⅳ）与５＇－硝基水杨基荧光酮（５＇－ＮＳＦ）发生显色反应，形成１：４的桔红色络合物，λｍａｘ＝５４０ｎｍ，ε为１．４６×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｚｒ（Ⅳ）含量在０￣０．５ｍｇ／Ｌ符合比尔定律。方法用于氧化铝及陶瓷釉料中锆的测定，结果与ＩＣＰ－ＡＥＳ法相符，ＲＳＤ（ｎ＝５）在１．３％￣３．７％。 相似文献
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本文研究了微晶萘吸附Ｐｂ（Ⅱ）—５—Ｂｒ—ＰＡＤＡＰ显色新体系的最佳实验条件。沉定分离洗涤后溶解于丙酮，在波长５６０ｎｍ处测定其吸收光度。在５ｍｌ丙酮溶液中铅含量ｐ（Ｐｂ）／（ μｇ·ｍｌ￣－１）在０—５范围内符合比尔定律，表现在尔吸光系数为５．６×ｌ０￣４Ｌ·ｍｏｌ￣１·ｃｍ￣－１。方法用于水中痕量铅的测定，结果满意。 相似文献
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5—（4—羧基苯偶氮）—8—（对甲苯磺酰氨基）—喹啉与金显色反应研究及应用 总被引：3，自引：1，他引：3
以８－氨基喹啉为母体，合成了新试剂５－（４－羧基苯偶氮）－８－（对甲苯磺酰氨基）－喹啉（ＣＰＴＳＱ），研究了它与Ａｕ的显色反应，在ＣＴＭＡＢ存在下，于ｐＨ１０￣１３的ＮａＯＨ介质中，ＣＰＴＳＱ与Ａｕ形成２：１紫蓝色络合物，最大吸收峰位于６１０ｎｍ，摩尔吸光系数１．０×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ａｕ含量在０￣１．２ｍｇ／Ｌ内符合比尔定律。方法选择性好，灵敏度高，操作简便，已用于金矿石样品 相似文献
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研究了新合成的１－（２－羟基－３,５－二硝基苯基）－３－「４－（苯基偶氮）苯基」－三氮烯（ＨＤＮＰＡＰＴ）试剂与铜的显色反应。在乳化剂ＯＰ存在下,ＰＨ１１．０的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ介质中,铜与ＨＤＮＰＡＰＴ形成的红色配合物,其组成比为１：２,λｍａｘ＝５４０ｎｍ,表观摩尔吸光系数ε５４０＝１．７３×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,铜的质量浓度在０￣３６０μｇ／Ｌ符合比尔定律。方法应用于大 相似文献
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钪（Ⅲ）的反相萃取柱色层新体系研究及应用 总被引：1，自引：0，他引：1
本文设计出钪（Ⅲ）的反相萃取柱色层新体系并加以应用。该新体系以聚四氟乙烯－７０１为载体，磷酸三丁酯（ＴＢＰ）为固定相，在１０ｍｏｌ·Ｌ￣（－１）盐酸中定量萃取层析钪（Ⅲ），用１０ｍｏｌ·Ｌ（－１）盐酸淋洗杂质元素，４ｍｏｌ·Ｌ（－１）盐酸解脱钪，经二甲酚橙光度法测定其回收率可达１００％。本法简便快速，选择性高，分离效果好，能用于岩石、矿物等物料中钪的定量分离、富集及测定。 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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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献