氢化物发生—ICP—AES法测定饮料中的痕量砷和汞

研究了连续氢化物发生－感耦等离子体原子发射光谱法测定饮料中Ａｓ和Ｈｇ的适宜条件，可以用较低的功率（１．１ｋＷ）获得稳定的分析信号，待测元素含量０．０５～０．１ｍｇ／Ｌ时，ＲＳＤ小于５％（１０次测定），加标回收率８７％～１００％。适用于多种饮料及其他溶液中痕量Ａｓ和Ｈｇ的测定。     

冷原子吸收与原子荧光法测定 As、Sb、Bi、Hg 的方法研究

样品经王水分解后，调制成１０％的ＨＣｌ介质。移至自制的Ｈｇ发生器中，加入ＳｎＯ２还原，以空气作载体，将Ｈｇ原子蒸气载入测Ｈｇ仪吸收管，冷原子吸收测Ｈｇ。便可实现一次溶矿与原子荧光连测样品中的微量Ａｓ、Ｓｂ、Ｂｉ、Ｈｇ。检出下限分别为：Ａｓ０．１８μｇ／ｇ；Ｓｂ０．０６７μｇ／ｇ；Ｂｉ０．０８７μｇ／ｇ；Ｈｇ０．０１１μｇ／ｇ。ＲＳＤ％分别为Ａｓ１１％；Ｓｂ６．３％Ｂｉ７．１％；Ｈｇ１．２％。     

4－（8－氨基喹啉－5－偶氮）－苯磺酸钠的极谱行为研究

研究了４－（８－氨基喹啉－５－偶氮）－苯横酸钠（ＳＡＯＡＢＳ）的极谱行为。在０．０２ｍｌ／ＬＮＨ＿３·Ｈ＿２Ｏ－０．３６ｍｏｌ／ＬＮＨ＿４Ｃｌ的缓冲溶液中，ＳＡＱＡＢＳ产生两个明晰的阴极化极谱波，其二次导数波的峰电位分别为－０．５２Ｖ和－１．３０Ｖ（Ｖｓ．ＳＣＥ）。用ＳＡＱＡＢＳ的第一个波作为定量分析的基础，其线性范围为１．０×１０￣（－６）～８．０×１０￣（－５）ｍｏｌ／Ｌ。氧不干扰ＳＡＱＡＢＳ的测定。还研究了ＳＡＱＡＢＳ的电极过程及反应机理。     

Hg（Ⅱ）－TMK－十二烷基磺酸钠增溶分光光度法测定Hg（Ⅱ）的研究及应用

本文研究了Ｈｇ（Ⅱ）－ＴＭＫ－十二烷基磺酸钠体系的分光光度特性和最适宜的显色条件。在ＰＨ值为３．５的ＨＡｃ－ＮａＡｃ缓冲溶液中。显色体系在５４０ｎｍ处有最大吸收。其摩尔吸光系数ε（５４０）为１．４６×１０￣５ｍｏｌ（－１）·ｃｍ（－１）·Ｌ．测得配合物组成为Ｈｇ（Ⅱ）：ＴＭＫ＝１：４．Ｈｇ（Ⅱ）在０～２５μｇ／２５ｍｌ范围内服从比耳定律。     

催化动力学荧光法同时测定SCN~－和I~－

利用Ｉ￣－、ＳＣＮ￣－都对Ｃｅ（Ⅳ）与Ａｓ（Ⅲ）的氧化还原反应具有催化作用的特点，动力学荧光法测定Ｉ￣－、ＳＣＮ￣－含量。又利用ＳＣＮ￣－时上述氧化还原反应的催化活性在一定条件下会失去的特点，选择性测定Ｉ￣－，进尔计算出ＳＣＮ￣－的含量，测定Ｉ￣－、ＳＣＮ￣－的线性范围分别为６．０×１０￣（－４）～６．０×１０￣（－３）、６．９×１０￣（－２）～１．４ｍｇ／Ｌ．水样回收率分别为８５％～１１０％和８８％～１１７％。     

Ag（I）－QARH络合物在胶束溶液中的光度性质

在ｐＨ５．０的ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中，当有０．１０％ＳＬＳ存在时，Ａｇ（Ｉ）与ＱＡＲＨ形成１：１络合物，λ＿（ｍａｘ）为５３５ｎｍ，ε为１．０５×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），Ａｇ（Ｉ）含量在０．００５～１．００μｇ／ｍＬ范围内服从Ｂｅｅｒ定律，稳定常数为１．７８×１０￣（１５）．所提出的方法用于精铜矿中微量银的测定，结果满意     

Ti（Ⅳ）－N－苯甲酰苯胲络合吸附波的研究

在ｐＨ４．５的５０ｍｍｏｌ·Ｌ~（－１）ＮａＡｃ－５０ｍｍｏｌ·Ｌ~（－１）ＮａＡｃ－０．４ｍｍｏｌ·Ｌ~（－１）Ｎ－苯甲酰苯胲（Ｎ－ＢＰＨＡ）底液中，用单扫示波极谱法可得到Ｔｉ（Ⅳ）的络合物吸附波，峰电位－０．６２Ｖ（ｖｓ．ＳＣＥ）左右。导数峰高与钛的浓度在４．２×１０~（－６）～２．０×１０~（－４）ｍｍｏｌ·Ｌ~（－１）的范围内呈线性关系，检出限为２．０×１０~（－６）ｍｍｏｌ·Ｌ~（－１）。实验表明，该极谱峰属于络合吸附波，测定其络合比为ｎ（Ｔｉ（Ⅳ））：ｎ（Ｎ－ＢＰＨＡ）＝１：３。该法应用于中成药“升板胶”中微量钛的测定。     

1，10－菲罗啉－5，6－二醌伏安行为研究

在０．５０ｍｏｌ·Ｌ~（－１）ＮＨ_３－ＮＨ_４Ｃｌ缓冲溶液中，１，１０－菲罗啉－５，６－二醌有一还原伏安峰。当静止富集２ｍｉｎ，ｖ＝１００ｍＶ·ｓ~（－１）时，其峰电位Ｅ_ｐ＝－１．３１Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）。用线性扫描和循环伏安法等手段研究体系的伏安行为，特别是吸附性。实验表明，该体系属具有吸附性的不可逆过程。用于单扫示波极谱法测定，线性范围为５．０×１０~（－８）～５．０×１０~（－６）ｍｏｌ·Ｌ~（－１），其相关系数为０．９９９５。     

高效液相色谱法测定1－硝基蒽醌和1－氨基蒽醌

探讨了１－硝基蒽醌（１－ＮＯ＿２ＡＱ）和１－氨基蒽醌（１－ＮＨ＿２ＡＱ）同时测定和分别测定的色谱条件，提出了在Ｓｈｉｍ－ｐａｃｋＣＬＳＳ－ＳＩＬ色谱柱上，以正庚烷－１，４二氧六环－乙酸乙酯（６５：３５：５（Ｖ／Ｖ）为流动相，流量为１．５ｍｌ／ｍｉｎ，柱温４０℃，以分光光度检测器于２５４ｎｍ处检测时，４ｍｉｎ内使１－ＮＯ＿２ＡＱ与１－ＮＨ＿２ＡＱ分离；５ｍｉｎ使１－ＮＨ＿２ＡＱ与杂质分离；７ｍｉｎ可使１－ＮＯ＿２ＡＱ与杂质分离的高效液相色谱分析法。其绝对检出下限１－ＮＯ＿２ＡＱ为０．０１２μｇ，１－ＮＨ＿２ＡＱ为０．０２６μｇ，变异系数分别为１．１％和０．９６％，回收率分别为９９．７％和１００．２％。     

新显色剂5－（4＇－氯－2＇羧基苯偶氮）绕丹宁与银的显色反应及其应用研究

在ＴｒｉｔｏｎＸ－１００存在下，ｐＨ＝５．０～５．５时，新试剂Ｃｌ－ＲＡＣＰ与银生成配合物，其最大吸收波长为５００ｎｍ，配合物的配位比为１：２，表观摩尔吸光系数为１．１×１０￣５·Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。Ａｇ（Ⅰ）的浓度在０～２．０μｇ·ｍｌ￣（－１）范围内符合比尔定律。该法用于阳极泥和废定影中银的测定，结果较满意，相对标准偏差为１％。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with