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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
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痕量银与meso－四（对－磺酸基苯基）卟啉显色反应的研究 总被引：4，自引：0，他引：4
研究了Ａｇ（Ｉ）与ｍｅｓｏ－四（对－磺酸基苯基）叶琳的光催化显色反应。在ｐＨｌ０的缓冲溶液中形成稳定的Ａｇ（Ｉ）－ＴＰＰＳ＿４－ＣＴＭＡＢ三元配合物，其最大吸收波长为４２６ｎｍ，组成为Ａｇ（１）ＴＰＰＳ＿４：ＣＴＭＡＢ＝１：１：２。表观摩尔吸光系数为２．７９×ｌ０￣５Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，Ａｇ（１）的浓度在０～０．２μｇ／ｍｌ内符合比尔定律。基于此建立的测Ａｇ（Ｉ）方法灵敏度高，结合巯基棉分离干扰，可用于矿物中Ａｇ（Ｉ）的测定。 相似文献
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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
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研究结果表明，在混合表面活性剂ＣＴＭＡＢ－吐温－６０存在下的ｐＨ５．７～６．５的缓冲介质中，Ｓｃ（Ⅲ）与４，５－二溴苯基荧光酮（ＤＢＰＦ）形成高灵敏的多元配合物，其ε＿（５９０）＝２．２６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），组成比为：Ｓｃ：ＤＢＰＦ：ＣＴＭＡＢ＝１：２：４。采用混合表面活性剂使增溶增敏作用更为显著，并加速了显色反应，增强了配合物的稳定性。而Ｎａ＿２ＳＯ＿４的加入能显著地提高体系的灵敏度。Ｓｃ量在０～０．３６ｕｇ／ｍｌ范围内遵守比尔定律。方法可直接测定合成混合稀土中的Ｓｃ，回收率在９８％～１０５％；结合沉淀分离和ＰＭＢＰ萃取分离，实现了地质试样中痕量Ｓｃ的测定。 相似文献
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常温下在ｐＨ４的ＨＡｃ－ＮａＡｃ缓冲体系中，Ｇａ与１，５－二（２－羟基－５－磺基苯基）－３－氰基甲 （ＤＳＰＣＦ）形成稳定的蓝色配合物。该配合物在波长６３０ｎｍ处有最大吸收，其表观摩尔吸光系数为３．８×１０￣４Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，配合比为ｎ（Ｇａ）：ｎ（ＤＳＰＣＦ）＝１：２，显色反应在２０ｍｉｎ内完成，稳定时间至少２４ｈ，Ｇａ量在０～１．８ｍｇ／Ｌ时遵守比尔定律。采用ＴＢＰ萃淋树脂分离干扰元素后可实现煤矸石中Ｇａ的测定。 相似文献
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铅－铁－三溴偶氮胂－邻菲罗啉共显色反应是由于生成多核络合物所致，在实验条件下，５ｍｉｎ显色反应完成，吸光度至少稳定６ｈ，其最大吸收峰在６３０ｎｍ处，对Ｐｂ的表观摩尔吸光系数为９．２×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），符合比尔定律的浓度范围是０～０．３２μｇ／ｍｌＰｂ。方法灵敏度高、选择性好，已成功地应用于硫铁矿和工业废水中痕量Ｐｂ的测定。 相似文献
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TritonX-100－5-Br-PADAP光度法测定铜和镍 总被引：2，自引：0，他引：2
研究了非离子型表面活性剂Ｔｒｉｔｏｎ Ｘ－ １００ 存在下,用５ － Ｂｒ － ＰＡＤＡＰ 光度法测定铜、镍的方法。结果表明：在ｐＨ９ ．０ 的硼砂缓冲介质中,５ － Ｂｒ － ＰＡＤＡＰ 与铜和镍生成紫红色络合物,λＣｕｍ ａｘ ＝ ５７５ ｎｍ ,εＣｕ ＝ １ ．０４ ×１０５ Ｌ·ｍｏｌ－ １·ｃｍ － １ ;λＮｉｍ ａｘ ＝ ５７５ ｎｍ ,εＮｉ ＝ １ ．１４ ×１０５ Ｌ·ｍｏｌ－ １·ｃｍ － １ 。铜和镍的质量浓度分别在０ ～５６０ μｇ／ Ｌ和０ ～４４０ μｇ／ Ｌ符合比尔定律。加入六偏磷酸钠后,由于偏磷酸镍的形成,镍不再与５ － Ｂｒ － ＰＡＤＡＰ 显色,可通过铜及铜镍总量的测定,计算出镍的含量。用该方法实测了钢样中铜和镍的含量,结果与推荐值相符,对铜和镍５ 次测定的ＲＳＤ均小于５ ％ 。 相似文献
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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
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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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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
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献
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正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37 相似文献
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正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.) 相似文献