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1.
微晶萘—双十二烷基二硫代乙酰二胺吸附显色连续测定铂和钯 总被引：3，自引：0，他引：3
微晶萘－双十二烷基二硫代乙酰二胺（ＤＤＯ）吸附显色剂与铂（Ⅱ）、钯（Ⅱ）卤络合物所形成的有色螯合物沉淀，经分离洗涤后分别溶于氯仿－石油醚混合溶剂中，于５１０ｎｍ和４４５ｎｍ处测定铂和钯螯合物的吸光度，在１０ｍＬ的ＣＨＣｌ３－石油醚中０￣１０μｇＰｔ及Ｐｄ均符合比尔定律。采用在铜镍矿基体中标准加入法检验所拟方法，钯的回收率为９３．３％￣１０６．７％，铂为９０％￣１０６％。 相似文献
2.
新型卟啉显色剂TDMAPTPS与钯的显色反应研究 总被引：4，自引：0，他引：4
研究了新型水溶性卟啉显色剂ＴＤＭＡＰＴＰＳ与钯的显色反应，在ｐＨ为３．４～５．０缓冲溶液中，适量ＶＣ，ＯＰ，ＳＤＢＳ存在，Ｐｄ（Ⅱ）与显色剂形成１：１稳定配合物，λｍａｘ＝４１３ｎｍ，ε＝１．６５×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ，Ｐｄ（Ⅱ）浓度在０～３．２μｇ／１０ｍＬ之间服比尔定律。该方法用于实际样品测定，结果满意。 相似文献
3.
研究了新型水溶性卟啉显色剂ＴＤＭＡＰＴＰＳ与钯的显色反应。在ｐＨ为３．４～５．０缓冲溶液中，适量ＶＣ、ＯＰ、ＳＤＢＳ存在下，Ｐｄ（Ⅱ）与显色剂形成１１稳定配合物。λｍａｘ＝４１３ｎｍ，ε＝１．６５×１０５Ｌｍｏｌ－１ｃｍ，Ｐｄ（Ⅱ）浓度在０～３．２μｇ／１０ｍＬ之间服从比尔定律。该方法用于实际样品测定，结果满意 相似文献
4.
研究了新试剂２，４－二溴－６－羧基苯重氮氨基偶氮苯与Ｔｌ（Ⅲ）的高灵敏显色反应。在非离子表面活性剂ＴｒｉｔｏｎＸ－１００存在下，于ｐＨ１０．５的ＮＨ＿３·Ｈ＿２Ｏ－ＮＨ＿４Ｃｌ缓冲介质中，Ｔｌ（Ⅲ’）与该试剂生成红色配合物，其配合物的最大吸收波长位于５２０ｎｍ处，摩尔吸光系数为１．８３×１０￣５Ｌ·ｍｏｌ￣－１·ｃｍ￣－１。Ｔｌ（Ⅲ’）量在０～０．６４μｇ／ｍｌ范围内符合比尔定律。方法用于废水中痕量Ｔｌ的测定，结果与其它方法结果相符。测定工业废水及粉煤灰中痕量Ｔｌ的ＲＳＤ（ｎ＝６）在１．６％～３．２％范围。 相似文献
5.
二安替比林邻乙氧基苯基甲烷与钒的高灵敏显色反应研究 总被引：7，自引：1，他引：6
合成了新试剂二安替比林邻乙氧基苯基甲烷（ＤＡｏＥＭ）,研究了它和Ｖ（Ⅴ）的显色反应。在Ｈ３ＰＯ４介质中,Ｍｎ（Ⅱ）和吐温２０协同作用下,ＤＡｏＥＭ和Ｖ（Ⅴ）生成橙色产物,λｍａｘ＝４８０ｎｍ,ε＝１．４×１０６Ｌ·ｍｏｌ－１·ｃｍ－１,Ｖ（Ⅴ）质量浓度在４～６０μｇ／Ｌ符合比尔定律。用于钢样和中草药中Ｖ（Ⅴ）的测定,结果与原子吸收法结果一致,５次测定结果的ＲＳＤ在１．８％～３．１％。 相似文献
6.
在０．１８～０．３２ｍｏｌ／ＬＨＣｌ介质中，Ｍｏ（Ⅵ）与３，４－二甲氧基苯基荧光酮（ＤＭＯＰＦ）和Ｔｗｅｅｎ－８０形成三元胶束配合物，最大吸收峰在５２６ｎｍ处，摩尔吸光系数为１．１６×１０￣５Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，Ｍｏ（Ⅵ）含量在０～０．５３μｇ／ｍｌ范围内符合比耳定律。所建立的方法用于矿样中Ｍｏ的测定，结果较为满意。 相似文献
7.
二溴羟基苯基荧光酮与铝显色反应的研究及应用 总被引：1，自引：0，他引：1
在ｐＨ为６．５的ＨＡｃ－ＮａＡｃ介质中，ＣＰＢ存在且经６０～７０℃加热，Ａｌ￣３＋与二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）４ｍｉｎ即完成显色反应，形成１：２紫红色络合物，吸光度至少稳定２４ｈ，最大吸收峰位于５６８ｎｍ处，摩尔吸光系数为１．１８×１０￣５，Ａｌ量在０～０．２μｇ／ｍｌ范围内符合比不定律。方法已应用于岩矿中微量Ａｌ的直接测定，其结果与标准值吻合较好，ＲＳＤ（ｎ＝５）均＜３％。 相似文献
8.
钯—二安替比林对溴苯基甲烷—钒体系阻抑动力学光度法测定微量钯 总被引：6，自引：0，他引：6
在Ｈ３ＰＯ４介质中,微量Ｐｄ（Ⅱ）能阻抑二安替比林对溴苯基甲烷（ＤＡｐＢＭ）与Ｖ（Ⅴ）的显色反应,阻抑程度与Ｐｄ（Ⅱ）量呈线性相关。据此建立了测定微量Ｐｄ（Ⅱ）的新方法。方法检测限为５６．０μｇ／Ｌ,测定范围为０．０～４８０．０μｇ／ＬＰｄ（Ⅱ）。阻抑反应的表观活化能为８６．７２ｋＪ／ｍｏｌ,表观速率常数为５．５７×１０－４／ｓ,反应终止后至少稳定２４ｈ。试样的加标回收率为９１．７％～１０１％（ｎ＝４）。该法用于ｗ（Ｐｄ）在１０－３水平的冶金产品和催化剂中钯的测定,结果与原子吸收法测定结果相符,ＲＳＤ（ｎ＝６）在２．８％～３．３％。 相似文献
9.
在ｐＨ３．３的ＨＡＣ－ＮａＡＣ缓冲介质中，金、钯、铊分别与硫代米Ｃｈｉ酮（ＴＭＫ）形成有色配合物，在吐温－８０存在下，不但实现水相显色，而且提高了灵敏度。利用分光光度法多波长测定和反推最小二乘法，建立了金、钯、铊三组分同时测定的方法。检出限为：１０ｎｇＡｕ／ｍＬ；４ｎｇＰｄ／ｍＬ，３０ｎｇＴｌ／ｍＬ。 相似文献
10.
2—（5—溴—2—吡啶偶氮）—5—二甲氨基苯胺与铂显色反应的研究及应用 总被引：7，自引：1，他引：6
研究了显色剂２（５溴２吡啶偶氮）５二甲氨基苯胺（５ＢｒＰＡＤＭＡ）与Ｐｔ（Ⅱ）的显色反应。结果表明,在乙醇存在下,１０～３２ｍｏｌ／ＬＨ３ＰＯ４介质中,试剂与Ｐｔ（Ⅱ）１５ｍｉｎ即形成稳定的紫蓝色配合物,并至少稳定２４ｈ。该配合物的最大吸收波长位于６２８ｎｍ处,表观摩尔吸光系数为８７３×１０４Ｌ·ｍｏｌ－１·ｃｍ－１,其组成为ｎＰｔ（Ⅱ）∶ｎ５ＢｒＰＡＤＭＡ＝１∶１,Ｐｔ（Ⅱ）的质量浓度在０～１０ｍｇ／Ｌ符合比尔定律。所拟方法用于二次合金管理样及催化剂中铂的直接测定,结果与推荐值相符,精密度好,ＲＳＤ＜０．５％（ｎ＝６）。 相似文献
11.
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
12.
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
13.
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
14.
15.
Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h 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
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