高锰酸钾直接氧化化学发光法测定甲磺酸酚妥拉明

基于盐酸介质中高锰酸钾直接氧化甲磺酸酚妥拉明产生化学发光这一现象,建立了一种简易、快速测定甲磺酸酚妥拉明的流动注射化学发光新方法.在优化的实验条件下,本法测定甲磺酸酚妥拉明的线性范围为0 05～6μg/mL,检出限为0 01μg/mL,对浓度为4 0μg/mL的甲磺酸酚妥拉明进行11次平行测定,得到相对标准偏差为3 0%.将本法用于针剂及尿样和血样中甲磺酸酚妥拉明的测定,结果令人满意.     

流动注射化学发光法测定左羟丙哌嗪

在硫酸介质中,高锰酸钾氧化左羟丙哌嗪产生化学发光,甲醛可大大增敏上述化学发光,据此建立了测定左羟丙哌嗪的流动注射化学发光分析新方法.在优化的实验条件下,该法测定左羟丙哌嗪的线性范围为0.01~4.0μg/mL,检出限(3σ)为0.94 ng/mL,对1.0μg/mL左羟丙哌嗪进行11次平行测定,其相对标准偏差为1.06%.将本法用于合成样品中左羟丙哌嗪的测定获得满意结果.     

化学发光法测定防己中的防己诺林碱

在酸性条件下,高锰酸钾氧化防己诺林碱产生化学发光,对影响化学发光强度的因素进行了实验和探讨,建立了高锰酸钾化学发光体系测定防己诺林碱的新方法.防己诺林碱浓度在0.13~300μg/mL的范围内成良好线性关系,检出限(DL)为0.078μg/mL,相对标准偏差(RSD)为2.6%.该方法已成功用于防己中防己诺林碱的含量测定,回收率为98%.此外借助紫外、荧光和化学发光等光谱手段,对体系的化学发光机理进行了初步探讨.     

环境水样中碘的流动注射化学发光分析方法

在酸性条件下,高锰酸钾氧化吡罗红B产生化学发光,I-的加入对该体系的化学发光有显著的增强作用,据此建立了流动注射化学发光法测定环境水样中I-的新方法.在优化的实验条件下,I-的质量浓度在8.0×10-4～1.0×10-1μg/mL范围内与发光强度呈良好的线性关系,检出限为1.6×10-4μg/mL.对0.1μg/mL I-标准溶液进行11次平行测定,相对标准偏差为0.87%.将本法应用于环境水样中I-的测定,取得满意结果.     

KMnO_4-HCHO化学发光反应体系测定白藜芦醇

在酸性介质中,高锰酸钾氧化白藜芦醇产生微弱的化学发光,甲醛对此体系有增敏作用,据此建立了一种化学发光测定白藜芦醇的新体系.在优化的实验条件下,白藜芦醇的浓度在0.005~1.000μg/mL范围内与发光强度呈良好的线性关系,方法的检测限为1.0 ng/mL.对浓度为0.1μg/mL的白藜芦醇连续进样11次,其RSD=0.76%.将本方法用于红葡萄酒中白藜芦醇的测定并做回收率实验,回收率为81%~116%.同时,在基于化学发光和紫外的基础上,对可能的机理进行了探讨.     

逆胶束介导的化学发光测定碘

十六烷基三甲基氯化烷(CTAC)在氯仿/环己烷(体积比为6 5)-少量水(含有鲁米诺)溶剂所形成的逆胶束介质中, 鲁米诺和碘的化学发光可以得到大大增强,据此,采用静态流动注射技术建立了简易、快速测定碘的化学发光新方法.详细研究了R值([C(H20)/C(表面活性剂)])、表面活性剂CTAC的浓度、pH值、鲁米诺浓度对化学发光信号强度的影响.在优化的实验条件下测定碘的线性范围为0.005～2.0 μg/mL,检出限(3σ)为0.001μg/mL,对浓度为1.0μg/mL的碘标准溶液进行了11次平行测定,相对标准偏差为3.83%.将本法用于食盐中碘的测定,结果令人满意.     

流动注射化学发光法测定扑尔敏

高锰酸钾在酸性介质中能氧化扑尔敏并产生弱的化学发光，甲醛的存在能大大增强化学发光强度。基于此发现，建立了一种测定扑尔敏的流动注射化学发光分析法。测定扑尔敏的线性范围为0．4～50μg/mL，方法的检出限为0．2μg/mL。对浓度为4．0μg/mL的扑尔敏溶液进行11次平行测定的相对标准偏差为1．4％，样品测定频率达到120h^-1。该方法用于药物制剂中扑尔敏含量的测定。并与药典标准方法进行了对照，结果一致。     

基于鲁米诺的流动注射化学发光法测定硫酸链霉素

建立了一种简易、快速测定硫酸链霉素的流动注射化学发光法.本法基于在强碱性介质中,硫酸链霉素能增强铁氰化钾氧化鲁米诺产生化学发光,加入亚铁氰化钾能大大降低这一体系的背景发光强度.在优化的实验条件下该法测定硫酸链霉素的线性范围为5～1000μg/mL,检出限(3σ)为0 6μg/mL.对100μg/mL的硫酸链霉素进行11次平行测定,其RSD为2 2%.将本法用于硫酸链霉素制剂及合成样品的分析,结果令人满意.     

反向流动注射化学发光法测定盐酸氯丙嗪

次氯酸钠氧化鲁米诺产生化学发光,盐酸氯丙嗪能抑制该反应的发光强度,据此结合反相流动注射技术建立了一种测定盐酸氯丙嗪的新方法.在优化的实验条件下,本法测定盐酸氯丙嗪的线性范围为0 1～10μg/mL,检出限为8 0×10-2μg/mL,对浓度为0 5μg/mL的盐酸氯丙嗪进行11次平行测定,其相对标准偏差为0 88%.本法应用于针剂、片剂及尿样中盐酸氯丙嗪含量的测定,结果令人满意.     

流动注射化学发光测定抗坏血酸及其机理探讨

研究发现,N-溴代琥珀酰亚胺(NBS)在碱性介质条件下,可以氧化抗坏血酸,在荧光素的增敏作用下,产生较强的化学发光.基于此建立了测定痕量抗坏血酸的流动注射化学发光新方法.抗坏血酸在0.05～100μg/mL的浓度范围内与化学发光强度呈良好的线性关系,检测限为(3σ)8.7ng/mL,对0.5μg/mL的抗坏血酸连续测定11次,相对标准偏差为2.3%.将本方法用于抗坏血酸制剂和片剂含量的分析,并与药典标准方法对照,其结果比较一致,说明该方法准确、可靠.     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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