用5-Br-PADAP为显色剂萃取光度法测定铁矿中微量镍

2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(简称5-Br-PADAP)是一高灵敏的显色剂、它与铋、钴、铜、镍、铁、镓、锰、铌、铀等十多种元素都能生成有色络合物。资料对镍与5-Br-PADAP络合物的光谱特征有所叙述。本文试验了5-Br-PADAP络合物显色的最佳条件,并考查了其它元素的干扰情况,采用了有机溶剂萃取比色,使灵敏度较水相提高了十倍。     

V—5-Br-PADAP—H_2O_2三元络合物分光光度法测定矿石中的微量钒

2—(5—溴—吡啶偶氮)—5—二乙氨基苯酚(简称5-Br-PADAP)已成功地用作分光光度法测定钒的灵敏试剂。文献[3]报告在过氧化氢存在下,用一氯醋酸控制酸度(pH1.5～2.0),钒与5-Br-PADAP生成1:1的络合物进行比色测定,但我们在实验中发现在该体系中络合物不太稳定,故改用磷酸-磷酸氢     

V—5-Br-PADAP—H_2O_2三元络合物分光光度法测定矿石中的微量钒

2—(5—溴—吡啶偶氮)—5—二乙氨基苯酚(简称5-Br-PADAP)已成功地用作分光光度法测定钒的灵敏试剂。 文献[3]报告在过氧化氢存在下,用一氯醋酸控制酸度(pH1.5～2.0),钒与5-Br-PADAP生成1∶1的络合物进行比色测定,但我们在实验中发现在该体系中络合物不太稳定,故改用磷酸-磷酸氢二钠缓冲液控制溶液酸度(pH2.0～2.25)显色测定,效果良好;并进一步证实此有色络合物为V、5-Br-PADAP、H_2O_2三元络合,其络合比为1∶1∶1。对其他条件也做了些试验,并拟定了一个简便的分析流程。测定下限为10ppm。适用于五氧化二钒含量,在0.00X％以上的矿样。     

5-Br-PADAP萃取分光光度法测定矿石中微克量铌

目前测定铌钽方法范围为几十微克,对于少量样品中痕量铌、钽难于测定。 等研究了吡啶偶氮类八种衍生物与铋的反应,并发现与二十八种金属离子(包括铌)能生成有色络合物。其后等利用5-(3,5-溴-吡啶偶氮)-2-乙氨基对甲酚研制了测定铌的方法(0—60微克)。史慧明等研究了铌与5-Br-PADAP在各种络合剂体系中的反应行为,制定了测定数十微克铌的方法。文献还试验了络合物的有机溶剂萃取。     

5-Br-PADAP萃取分光光度法测定矿石中微克量铌

目前测定铌钽方法范围为几十微克,对于少量样品中痕量铌、钽难于测定。 等研究了吡啶偶氨类八种衍生物与铋韵反应,并发现与二十八种金属离子(包括铌)能生成有色络合物。其后等利用5-(3,5-溴-吡啶偶氮)-2-乙氨基对甲酚研制了测定铌的方法(0—60微克)。史慧明等研究了铌与5-Br-PADAP在各种络合剂体系中的反应行为,制定了测定数十微克铌的方法。文献还试验了络合物的有机溶剂萃取。     

5—Br—PADAP光度法测定黄铁矿中微量银

2-(5溴-2-吡啶偶氮)-5-二乙基胺基苯酚(简称5-Br-PADAP)为铀(Ⅵ)、铌(Ⅴ)、钴(Ⅱ)等多种金属离子的灵敏显色剂,但试剂能否作为银(Ⅰ)的显色剂,则迄今尚未见有报导。本工作试验了以阴离子表面活性剂十二烷基硫酸钠(SLS)     

5—Br—PADAP光度法测定黄铁矿中微量银

2-(5溴-2-吡啶偶氮)-5-二乙基胺基苯酚(简称5-Br-PADAP)为铀(Ⅵ)、铌(Ⅴ)、钴(Ⅱ)等多种金属离子的灵敏显色剂,但试剂能否作为银(Ⅰ)的显色剂,则迄今尚未见有报导。本工作试验了以阴离子表面活性剂十二烷基硫酸钠(SLS)     

氢化分离-萃取目视比色法测定化探试样中痕量铋

5-Br-PADAP是目前偶氮染料中灵敏度很高的一种有机显色试剂,在pH2,试剂与Bi~( 3)生成络合比为1:1的红紫色螯合物,λmax=590nm,ε=5.8×10~4,络合物的表观稳定是常数为7.6×10~5,前人曾应用该显色剂进行了光度法测定微量铋的研究。     

钴—5—Br—PADNm络合物的光度性质研究及其应用

本文研究了钴(Ⅱ)-5-Br-PADNm络合物的光度性质。在pH5.0缓冲溶液中,有TritonX-100存在时,Co~(2 )与5-Br-PADNm形成1:2红色络合物,λ_(max)为547nm,ε为1.35×10~5l·mol~(-1)·cm~(-1)。所提出的方法用于矿石及茶叶中Co的测定,得到满意结果。     

岩石、土壤中微量铜、镍、钴的连续催化极谱测定

国内外许多学者已较详细地研究钻、镍与丁二肟络合物产生催化波的性质和电极过程机理,并在实践中已广为应用。俞德先等提出在丁二肟—NaNO_2(pH7～8)体系中钴可产生灵敏度达10~(-10)催化波。厂.B.Hp。xop。sa究研了铜、钴、镍等丁二肟络合物在pH9时产生催化氢波的性质并应用于水质分析中这三种元素的连续测定。在我国应用催化极谱连续测定矿石中钻、镍已有报道,但尚未见到同一体系中应用催化极谱同时测定三个微量元素的方法。     

新疆准东煤田复杂地层钻进技术

新疆准东煤田库兰喀孜干矿区地层复杂,容易发生套管跑管、断管、孔壁坍塌、孔斜等孔内事故,给钻探施工带来较大难度。结合工程实际,介绍了该矿区复杂地层钻进较为成功的技术措施和基本做法。     

土钉支护结构优化的改进遗传进化-复合形算法

对于土钉支护结构优化这样一个二重优化问题，采用改进遗传进化算法调整土钉设计参数，并利用复合形法搜索支护结构的临界滑面，从而得出保证工程安全可靠且造价最低的最优设计方案。     

Structure and Folding of the Kiselyovka-Manoma Accretionary Complex in the Lower Amur Region,Russian Far East

The Kiselyovka-Manoma accretionary complex, formed at the end of the Early Cretaceous, is a part of the Early Cretaceous Khingan-Okhotsk active continental margin. It is located at the front of the Amur accretionary complex and is composed of Jurassic-Lower Cretaceous oceanic volcanic-siliceous deposits. The structural study of this complex in the Lower Amur region hSas made it possible to clarify its overall structure and to subdivide the folds with different morphologies and orientations into five types. The analyzed folding sequence is compared to the folds of the Amur accretionary complex. The fold kinematics indicates various senses of motions that do not reveal systematic kinematic patterns of stacking of the accreted tectonic slices.     

极化大地复电阻率正反演

论述了层状极化大地复电阻率正、反演算法。给出了层状极化大地条件下三极和对称四极装置视复电阻率的解析表达式,并引入线性滤波方法实现表达式的求解。正演算例计算结果表明;随着频率的降低,复电阻率相位峰值增大;随着极化层层厚增加,复电阻率虚部平缓变化后连续递增。介绍了递推反演算法的实现过程,从理论模型试算结果看,测深曲线较好地反映了极化层Cole-Cole参数随深度的变化规律,其曲线的首支和尾支趋近于极化层的真Cole-Cole参数,表明了反演计算的可行性。     

滇西宝兴厂喜山期复式岩体锆石标型特征及成因意义

文章运用Pupin的锆石群型研究方法,对滇西宝兴厂喜马拉雅期复式岩体中锆石的鉴定和统计,研究表明,本区复式岩体中的锆石有18种亚型,主要由{100}、{110}柱面和{111}、{311}锥面组成,其中柱面以{100}特优发育,锥面以{111}最为发育;众所周知,温度、酸性、碱性程度等对晶形的发育影响很大,本次研究锆石结晶速度较快,结晶温度较低,且在偏碱性的环境下形成的。锆石的结晶标型显示本区复式岩体是以壳源为主的壳幔混合成因的花岗岩,具有富水、富碱、富含成矿物质的特征,成为有利成矿的岩浆系统。     

Geochemical evidence for the ophiolitic nature of the gabbros,gabbroanorthosites, and ultramafic rocks of the Gerbikan fragment of the Baladek Massif of the southeastern framing of the North Asian craton

The Baladek Massif represents a tectonic block located at the boundary between the SE framing of the North Asian craton and the fold structures of the Galam terrane of the Mongol-Okhotsk fold belt. According to the existing concepts, the rocks of this massif are regarded as Precambrian complexes of the aforementioned craton. This paper reports the results of studying the fragment of the Baladek Massif in the Gerbikan River basin. New geochemical data obtained on the gabbros, gabbroanorthosites, and ultramafic rocks testify to their similarity with typical ophiolite complexes. An underlying complex of metamorphic ultrabasic rocks, a layered complex of pyroxenites and “cumulate” gabbros, gabbroanorthosites, and a complex of isotropic gabbros were distinguished within this fragment. It is highly possible that the basic volcanic rocks and jaspers of the Silurian-Lower Devonian sequences of the Galam segment of the Mongol-Okhotsk fold belt also belong to the inferred ophiolite complex.     

徐淮地区中生代侵入杂岩中角闪岩和片麻岩类捕虏体的岩石学和地球化学:对深部地壳物质组成的制约

徐淮地区中生代侵入杂岩中角闪岩和片麻岩类捕虏体的主要元素、微量元素地球化学特征及其岩相学的研究表明,它们经历了两期变质作用的改造,即早期的榴辉岩相变质和晚期的角闪岩相退化变质。其原岩为拉斑玄武质岩石,在其形成过程中有较强的陆壳物质混染;部分捕虏体可能代表了本区深部地壳的物质组成,且具有华北地块基底的性质。中生代早期该区上地幔是多种岩石构成的构造混杂岩带,深部地壳主要由片麻岩类、角闪岩类和少量石榴辉石岩类组成。早白垩世时期深部地壳主要由一套快速折返至下地壳的榴辉岩相变质岩石所构成,它们普遍发生了角闪岩相退化变质,并与原下部地壳的深变质岩(片麻岩和角闪岩)混杂在一起,构成了一个构造混杂体。     

从反射地震剖面认识龙门山断裂带彭灌杂岩深部结构

彭灌杂岩位于龙门山断裂带中段,是龙门山区域地质构造重要组成部分.通过对一条穿过彭灌杂岩中部的深地震反射剖面进行分析解释,描述该区域彭灌杂岩深部结构特征及形成机制.地震反射剖面分析表明彭灌杂岩在纵深上存在分层结构,且彭灌杂岩存在底界面,在该区域表现出无根特征,参考岩体层倾向推断原岩应来自现位置西北方向更深部;同时剖面能量图上映秀-北川深部断裂位置发育在彭灌杂岩体不同分层间隙,未破坏彭灌杂岩主岩体深部结构,彭灌杂岩体浅部的断层发育与龙门山地表断裂系统一致,表明彭灌杂岩成岩时间早于龙门山构造运动;综合岩性及成岩时间推断彭灌杂岩源于现有位置的西北方向大陆基底,由印支期板块运动中松潘陆块基底物质多期次上涌形成,并在喜山运动期受到西北方向应力推覆隆起到达目前位置.      

5-Br-PADAP萃取光度法测定化探样品中的微量锑

资料[1、2]研究了5-Br-PADAP和碘化钾同三价锑能够形成蓝绿色的三元络合物,且能被苯萃取。但未见应用于岩矿中微量锑的测定。资料[3]介绍了碘化铵能对岩矿样品进行挥发性分解,锑以三价锑和五价锑的形式挥发出来,达到分离目的。本文在前人工作的基础上,进行了条件试验,采用碘化铵既分解样品,又能代替碘     

Deformation History of the Kunavaram Complex, Eastern Ghats Belt, India: Implications for Alkaline Magmatism Along the Indo-Antarctica Suture

The Kunavaram alkaline complex is a NE-SW trending elongate body located along a major lineament, the Sileru Shear Zone (SSZ) that is regarded as a Proterozoic suture related to Indo-Antarctica collision. The complex is hosted within migmatitic quartzofeldspathic gneisses, mafic granulites retrogressed to amphibolites, and quartzites. The structural evolution of the country rocks and the alkaline complex are similar. The first phase of deformation, D₁, produces a pervasive segregation banding (S₁) in all rock units within and outside the complex. A second deformation phase D₂ isoclinally folded S₁ along subvertical axial planes with shallow plunging axes. F₂ isoclinal folds are ubiquitous in the country rocks and the eastern extremity of the complex. In the interior of the alkaline body, D₂ strain decreases and S₁ is commonly subhorizontal. While amphibolite to granulite facies conditions prevailed during deformation, post-D₂ annealing textures testify to persisting high grade conditions. In the west, a NNE-SSW trending dextral shear zone with strike-slip sense (D₃) truncates the complex. Within this shear zone, quartzofeldspathic country rocks are plastically deformed, while hornblende-K-feldspar assemblages of the complex are retrogressed to biotite and plagioclase. Warping related to D₃ shears also resulted in fold interference patterns on the subhorizontal S₁ foliation in low D₂ strain domains. Based on its steep dip, north-easterly trend, and non-coaxial nature with dextral strike-slip sense, the D₃ shear zone can be correlated with the SSZ. Since this shear zone, i.e., the SSZ, is not associated with primary igneous fabrics and resulted in solid state deformation of the complex, it cannot be considered as a conduit for alkaline magmatism, but is probably responsible for the post-tectonic disposition of the pluton.