钪-钙-茜素S异多核络合物的极谱吸附波

报道了钪－钙－茜素Ｓ（ＡＲＳ）异多核络合物极谱吸附波的形成及利用它测定钪的最佳实验条件。用此方法测定了矿石中的微量钪,并初步探讨了该极地的性质和电极反应机理。在单扫描极谱上用等魔鬼洋连续变化法和单纯形法测得络合物组成的摩尔比为ｎｓｃ＾３＋,ｎｃａ＾２＋;ｎＡＲＳ＝２：１：２。     

钪—镧—对氟偶氮氯膦体系共显色效应的研究及应用

本文研究了钪－镧－对氟偶氮氯膦体系共显色效应的光度特性及测定钪的最佳条件，建立了光度法测定痕量钪的新方法。该法的表观摩尔吸光系数为８．５７×１０＾４Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｓｃ（Ⅲ）浓度在０．０－５．０μｇ／２５ｍｌ范围符合比尔定律。将本法用于镁基，铁基合成试样中痕量钪的测定，结果满意。     

钪－间氯偶氮安替比林络合物吸附波的研究

在ｐＨ４．３０的ＨＡｃ－ＮａＡｃ介质中，钪－间氯偶氮安替比林（ｍ－ＣＡＡ）－硫氰酸钾生成三元络合物，于－０．３５Ｖ（ｖｓ．ＳＣＥ）处出现一尖锐的极谱峰，峰电流与钪离子浓度在０．０２０～０．２０μｇ／ｍＬ范围内呈线性关系，检出限为０．０１０μｇ／ｍＬ．用多种电化学方法研究了极谱波的性质及电极反应机理．方法用于矿样中钪的测定，结果满意     

钪-钇-茜素红S异多核络合物极谱吸附波的研究

报道了钪－钇－茜素红Ｓ异多核铬合物的形成及该异多核络合物极谱吸附波测定钪的最佳实验条件。用此方法测定了纯氧化钇中的微量钪,并探讨了该极谱波的性质和电极反应机制。在单扫描示波极谱上用单纯形法和改良的平衡移动法测得该异多核络合物组成的摩尔比为：ｘＳｅ＾３＋：ｘＹ＾３＋：ｘＡＲＡ＝１：２：５。     

以PMBP为化学改进剂的电热蒸发/ICP-AES测定痕量钪的研究

报道了以１－苯基－３－甲基－４－苯甲酰基－吡唑酮［５］（ＰＭＢＰ）为化学改进剂的ＥＴＶ－ＩＣＰ－ＡＥＳ测定痕量钪的新方法．详细研究了金属螯合物在石墨炉内的形成、挥发及其影响因素；发现过量ＰＭＢＰ的存在有利于该螯合物的形成，并定量蒸发／传输至等离子体中．在优化的实验条件下，钪的检出限为０．３ｎｇ／ｍＬ，相对标准偏差为２．４％（ｃ＝０．１μｇ／ｍＬ，ｎ＝７）．本法已用于标准参考物机动车尾气尘粒中钪的测定，获得了满意的结果．     

高纯氧化钪中稀土杂质的电感耦合等离子体质谱法测定

研究了用电感耦合等离子体质谱法测定高纯氧化钪中１５个稀土杂质的方法。考察了基体效应及内标的作用，采用Ｉ或Ｃｓ为内标可很好补偿基体ＳＣ的影响。方法检测限为０．０１３－０．０８５ｎｇ／ｍｌ，加料回收率为９１．２％－１０５．７％，相对标准偏 １．４％－８．１％。     

丁基罗丹明B—钼酸盐光度法连续测定铈和钪

在聚乙烯醇（ＰＶＡ）存在下，丁基罗丹明Ｂ（ＢＲＢ）分别与铈钼、钪钼杂多酸络阴离子形成离子缔合物，其最大吸收均位于５７０ｎｍ，表面摩尔吸光度分别为εＣｅ＝３．９６×１０＾６Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，εＳｃ＝４．７１×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，服从比耳定律范围分别为０－２４μｇ／Ｌ Ｃｅ和０－６０μｇ／ＬＳｃ，测定极限为Ｃｅ１．０μｇ／Ｌ（ｎ＝１２）和Ｓｃ１．９μｇ／Ｌ（ｎ＝１０），对     

钪（Ⅲ）—对氯偶氮氯膦—L三元配合物显色体系的研究与应用

提出了钪（Ⅲ）－对氯偶氮氯膦－Ｌ三元配合物显色体系，并对其显色条件及第二配位体Ｌ对该显色体系的影响等问题进行了系统的研究。同时测定了配合物的组成比、带电性及共存离子的影响。推测了该三元络合物的可能结构。钪含量在０￣７．５μｇ／２５ｍＬ服从比尔定律。表观摩尔吸光系数为１．５２×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１。采用该三元体系测定了钒钛磁铁矿中的微量钪，结果满意。     

PMBP为载体的乳状液膜提取钪的研究

研究了以１－苯基－３－甲基－４－苯甲酰基吡唑酮－５（ＰＭＢＰ）为流动载体的乳状液膜（ＥＬＭ）法提取钪，确定最佳液膜体系组成为０．４％ＰＭＢＰ－３％Ｓｐａｎ８０－５％液体石蜡－煤油－３ｍｏｌ／ＬＨＣｌ，Ｒｏｉ＝１：１（油内比）．Ｒｗｅ（水乳比）可达２０：１．用该体系对钪与混合稀土进行分离，钪的回收率可达９５．５％，分离系数β（ＳＣ／ＲＥ）＝３２．０。     

聚乙烯醇存在下钼酸盐和罗丹明B光度法测定钪

在聚乙烯醇存在下，钪相杂多酸和罗丹明Ｂ（ＲＢ）形成离子缔合物，其最大吸收位于５７０ｎｍ，表观摩尔吸光系数ε值为５．６２×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，服从比耳定律范围０－１．０μｇＳｃ／２５ｍＬ，检出限１．１ｎｇ／ｍＬ（ｎ＝９），考察了５０多种外来离子影响，缔合物的摩尔组成为Ｓｃ：Ｍｏ：ＲＢ＝１：１２：６，方法用于地质样品中钪的分析，结果满意。     

利用手持技术改进测定乙醇分子结构实验

利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。     

Neutral diterpenoids of oleoresins of five species of conifers of Transcarpathia

The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988.     

光谱仪测试范围的扩展

由于石化行业的生产需要，其材质的使用具有多样性和广泛性，经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识，根据光谱仪的测试能力及标样的采集，实现了一个或几个元素测量范围的扩展，并对其测量的影响因素进行了研究。     

Dichroism of absorption and polarization of phosphorescence of molecules of the closed form of nitrobenzospirothiopyran

The spectral-polarization characteristics of absorption and phosphorescence of molecules of the initial form of nitro-substituted indolinospirobenzothiopyran were studied in oriented polyethylene films and in solutions with different polarity. An oscillator model of the electron transitions responsible for the formation of absorption and luminescence spectra was suggested. It was established that the principal differences in the spectral and photophysical properties of the compound studied and its oxygen-containing analog are associated with the fact that the electronegativity of the S atom is lower than that of the O atom. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1143–1146, June, 1997.     

Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin

The oxygen quenching rate constants for singlet and triplet excited states of the dimethyl ester of mesoporphyrin IX increase with decreasing viscosity of the medium and reach a maximum at a viscosity of approximately 0.4 mPa·sec, after which the rate constants begin to decrease. The drop in rate constant with increasing fluidity of the medium may be related to a nonequilibrium character of the elementary act in the interaction of the reactants in the solvent cage. In viscous media such as isopropyl alcohol, isobutyl alcohol, and isoamyl alcohol, the reaction radius is greater than the sum of the radii of the reacting particles. The long-range character of these processes is due to the relatively weak dependence of the quenching probability on distance.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 161–167, March–April, 1989.     

Determination of heats of detonation and influence of components of composite explosives on heats of detonation of high explosives

The heats of detonation of 20 simple high explosives and explosive mixtures were determined by means of an adiabatic detonation calorimeter designed by the authors. The results indicated that the performance of the instrument was reliable and the experimental data were very accurate. For explosive mixtures, there was a linear accumulative relationship between the heats of detonation of the explosive mixture and its components. Accordingly, the heats of detonation of explosive mixtures could be calculated directly from the heats of detonation of simple explosives and the characteristic heats of other components. The experiments showed that the gold or brass shell of the cylindrical charge could be substituted by a thick-walled porcelain shell, which had the advantage of cheapness.

     

物质分配系数的测定实验改进

实验教学目的是从解决实际问题出发,以实验技术训练和实验设计思想培养为目标。介绍了将单一的物质分配系数测定实验改进为综合实验,提高了实验效果及实验资源利用率。     

Effect of the Method of Modification of Zeolite X on Selectivity of Catalytic Methylation of Toluene

Theoretical and Experimental Chemistry - The effect of the method of modification of catalysts based on zeolite X by cesium and magnesium cations (ion exchange and impregnation) on the selectivity...