双乙醛草酰二腙分光光度法——Ⅰ.纯铅中铜的测定

一、引言Jacobsen等研究了双环巳酮草酰二腙(简称BCO)和双乙醛草酰二腙在铜分析中的应用。在Cu~( 2)离子与BCO试剂形成蓝色络合物后,加入过量乙醛,则双环巳酮草酰二腙的环巳酮被乙醛代换而成双乙醛草酰二腙,溶液的蓝色立即变为紫红色.此络合物的络合比为1:2,较Cu~(2 )—BCO络合物显色快、且稳定,克分子吸光系数最大(ε=2.3×10~4);灵敏度超过新亚铜灵、DDTC、BCO法;并且此络合物又容易制得.虽然这一反应早被介绍,但未见推广.     

DIPF光度法测定食品和水样中微量铜的研究

研究了新试剂二碘苯基荧光酮（ＤＩＰＦ）与铜的显色反应,在ＰＨ＝５．４盐酸－六次甲基四铵缓冲介质中,溴化十六烷基吡啶（ＣＰＢ）存在下,ＤＩＰＦ与铜反应生成３：１红色络合物,λｍａｘ＝５６０ｎｍ,ε＝８．０４＊１０＾４ｌ．ｍｏｌ＾－１．ｃｍ＾－１,铜含量在０－１５μｇ／２５ｍＬ内符合比尔定律,方法用于食品和水样中微量铜的测定,结果令人满意。     

人发中微量铜的测定—乙醛草酰二腙分光光度法

本文用双乙醛草酰二腙分光光度法测定人发中的微量铜,利用铜与双环己酮草酰二腙(BCO)和双乙醛草酰二腙在PH810条件下形成1:2有色络合物[1]的原理而制定的分光光度分析法,其方法简便,结果准确     

人发中微量铜的测定--双乙醛草酰二腙分光光度法

本文用双乙醛草酰二腙分光光度法测定人发中的微量铜，利用铜与双环己酮革酰二腙(BCO)和双乙醛革酰二腙在PH8-l0条件下形成1：2有色络合物^[1]的原理而制定的分光光度分析法，其方法简便，结果准确．     

新显色5—（4—磺基—1—萘偶氮）—8—羟基喹啉与铜显色反应的？…

本文研究了显色剂５－（４－磺基－１－萘偶氮）－８－羟基喹啉与铜显色反应的条件，结果表明：在ＰＨ＝１２．５的介质中，显色剂铜生成了３：１黄色稳定配合物，利用褪色江度法，λｍａｘ＝５２９ｎｍ，ε＝３．７×１０＾４Ｌｍｏｌ＾－１ｃｍ＾－１，铜量在０－３５μｇ／５０ｍｌ范围内遵循比耳定律，方法选择性好，可用于铜合金中铜含量的测定。     

锌试剂显色树脂相分光光度法测定微量铜（II）

用锌试剂显色在ｐＨ５．０￣９．５条件下，铜（Ⅱ）与锌试剂生成绿色配合物与７１７型强碱性阴树脂交换吸附，进行树脂相分光光度法测定微量铜（Ⅱ），λｍａｘ为６４０ｎｍ，铜（Ⅱ）在０￣０．５ｍｇ／ｌ范围符合Ｂｅｅｒ定律，表观摩尔吸光系数ε为２．１６×１０＾－５ｌ·ｍｏｌ＾－１·ｃｍ＾－１，比水相（ε＝１．９×１０＾４ｌ·ｍｏｌ＾－１·ｃｍ＾－１）提高１１倍。用此法测定天然水中铜（Ⅱ）和钢样中微量铜（Ⅱ）得     

锌（II）与TADNm的显色反应及应用研究

研究了ＴＡＤＮｍ与Ｚｎ（Ⅱ）的显色反应。在氨性溶液中，当有０．０１４％ＣＰＢ存在时，Ｚｎ（Ⅱ）与ＴＡＤＮｍ形成１：４的红色络合物，λｍａｘ为５２５ｎｍ，ε为５．４×１０＾４Ｌ·ｍｏｌ＾－１·ｃｍ＾－１。方法用于头发和天然水中锌的测定，结果满意。     

铜-双环己酮草酰二腙配位吸附波的研究

本文提出了一个以双环已酮草酰二腙为试剂测定铜的新的极谱法。该法基于在pH8,8的柠檬酸胺一一氨水等碱性介质中,铜与双环已酮草酰二腙形成的配合物于-0.43V(vs·SCE)产生一灵敏的极谱波,铜浓度在0.008-0.32μg/ml 范围内与二次导数波高成直线关系,应用于水样和人发样中铜的测定,结果满意。     

2-(H酸偶氮)-4,5-二硝基酚光度法测定铝的研究和应用

研究了新试剂２－（Ｈ－酸偶氮）－４,５－二硝基酚（ＨＡＤＮＰ）与铝的显色反应,在ＰＨ５．３的六次甲基四胺－盐酸缓冲介质中,ＨＡＤＮＰ与Ａｌ＾３＋生成３比１的紫色络合物,λｍａｘ＝５７０ｎｍ,ε＝３．２９＊１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,Ａｌ质量浓度在０－４８０μｇ．Ｌ＾－１内符合比尔定律,方法用于水样测定,结果满意。     

二安替比林基—（3,4—亚甲二氧基）—苯基甲烷光度法测定微…

合成了二安替比林基－（３，４－亚甲二氧基）苯基甲烷，研究了ＤＡＤＭＰＭ与Ｃｒ的显色反应。在Ｈ３ＰＯ４介质中，在Ｍｎ和吐温２０存在下，Ｃｒ与ＤＡＤＭＰＭ反应生成橙黄色产物，λｍａｘ为４７０ｎｍ，摩尔吸光系数ε＝３．０×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－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