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1.
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   

2.
Fe-对硝基苯基荧光酮-CTMAB在pH10.0-11.2的硼砂-NaOH缓冲溶液中形成蓝色多元配合物,其组成为Fe:p-NPF:CTMAB=1:2:4。在吐温-60下,λmax为160nm,ε610=1.12×10^5L.mol^-1.cm^-1,Fe含量在0-0.2μg/ml范围内符合比耳定律。  相似文献   

3.
3,5—二溴—4—偶氮变色酸苯荧光酮与铝显色反应及应用   总被引:6,自引:0,他引:6  
黄应平  张华山 《岩矿测试》1997,16(4):293-295
研究了在阳离子表面活性剂CTMAB存在下,Al与3,5-二溴-4-偶氮变色酸苯基荧光酮的是色反应条件和光变性质。在pH6.0的HAc-NaAc缓冲介质中,Al与试剂形成1:2的红色配合物,最大吸收峰位于560nm处,表观摩尔吸光系数为1.25×10^4L.mol^-1.cm^-1,Al的质量浓度为0-0.2mg/L时符合比尔定律。  相似文献   

4.
研究了新合成的meso-四(2-磺酸萘基)卟啉(TNPS4)与Mn^2+的显色反应。在pH8.0的Na2B4O7-HCl缓冲溶液中,TNPS4与Mn^2+形成稳定的配合物,最大吸收波长470nm,配合物组成为TNPS4:Mn^2+=2:1,表观摩尔吸光系数ε=1.03×10^5L·mol^-1·cm^-1,线性范围0.0-5.0μgMn^2+/25ml。用于化探样品中Mn的测定,结果令人满意。  相似文献   

5.
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   

6.
罗宗铭  钟卓荣 《岩矿测试》1994,13(3):189-193
在PH2.5的氯乙酸缓冲介质中,有溴化十六烷基三甲基胺存在下,Mo与氨三乙酸及溴邻苯三酚红形成胶束混配配合物,该配合物最大吸收波长在600nm,摩尔吸光系数为7.27×10^4L.mol^-1.cm^-1,配合物组成为Mo(Ⅵ):NTA:BPR:CTMAB=1:1:2:4。Mo(Ⅵ)量在0-1.0μg/ml范围内符合比尔定律。由于NTA的存在,改善了方法的选择性,可直接分光光度测定矿石及钢中微量M  相似文献   

7.
在pH2.5的氯乙酸缓冲介质中,有溴化十六烷基三甲基铵(CTMAB)存在下,Mo(Ⅵ)与氨三乙酸(NTA)及溴邻苯三酚红(BPR)形成胶束混配配合物,该配合物最大吸收波长在600nm,摩尔吸光系数为7.27×10 ̄4L·mol ̄(-1)·cm ̄(-1),配合物组成为Mo(Ⅵ):NTA:BPR:CTMAB=1:1:2:4。Mo(Ⅵ)量在0~1.0g/ml范围内符合比尔定律。由于NTA的存在,改善了方法的选择性,可直接分光光度测定矿石及钢中微量Mo。  相似文献   

8.
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   

9.
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   

10.
研究了新试剂邻羧基苯基重氮氨基-4-苯基-2-噻唑与Cu^2+的显色反应,在非离子表面活性剂TnitonX-100存在下,于PH8.6的Na2B4O7-HCl缓冲介质中,Cu^2+与该试剂生成1:1的红色配合物,其配合物的最大吸收波长为510nm,摩尔吸光系数为5.4*10^4L.mol^-1.cm^-1。  相似文献   

11.
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   

12.
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   

13.
HYDROGEOLOGY     
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   

14.
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   

15.
16.
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   

17.
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   

18.
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   

19.
GEOCHEMISTRY     
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   

20.
正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)  相似文献   

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