鲁米诺-过氧化氢体系流动注射化学发光法测定乐果

基于有机磷农药乐果与碱性鲁米诺-过氧化氢体系的化学发光反应,直接对乐果进行检测,并对反应条件进行优化,据此建立了快速测定微量乐果的流动注射化学发光分析法.该方法的线性范围为1.0×10-8-1.0×10-5 g/mL,对1.0×10-6 g/mL的乐果标准溶液平行测定11次,相对标准偏差为2.1%,3σ检出限为8.0×10-9 g/mL,加标回收率为96.4%-103.5%.此法用于大米中乐果残留量的测定,结果令人满意.     

反相流动注射抑制化学发光法测定扑热息痛

基于扑热息痛能抑制磷钼钒杂多酸氧化鲁米诺产生化学发光的原理,结合流动注射分析技术,提出了一个测定扑热息痛的化学发光新体系.扑热息痛在2.0×10-7~6.0×10-5 g/mL浓度范围内与化学发光信号呈线性关系,检出限为6×10-8 g/mL.对8.0×10-6 g/mL的扑热息痛进行11次连续测定,相对标准偏差为3.4%.该方法快速、灵敏,已经被成功地应用于小儿速效感冒灵中扑热息痛的测定.     

流动注射化学发光法测定痕量钒(Ⅴ)

基于在硫酸介质中钒(Ⅴ)与磷钼酸形成具有更强氧化性的磷钼钒杂多酸(HPA),而磷钼钒杂多酸可直接氧化碱性鲁米诺产生强的化学发光,并结合流动注射分析技术,建立了一种测定痕量钒的新方法.其线性范围为5 0×10-9～1 0×10-5g/mL,方法的检出限为1 0×10-9g/mL.测定2 0×10-7g/mL的钒,11次连续测定的相对标准偏差为2.2%.方法已用于水样中痕量钒的测定.     

反相流动注射化学发光法测定盐酸小檗碱

基于盐酸小檗碱抑制磷钼钒杂多酸氧化鲁米诺产生化学发光,结合流动注射分析技术,提出了一种测定盐酸小檗碱的新方法.盐酸小檗碱在1.0×10-7～1.0×10-4 g/mL浓度范围内与化学发光分析信号呈线性关系;检出限为4×10-8 g/mL;对5.0×10-6 g/mL的盐酸小檗碱进行11次连续测定,相对标准偏差为1.2%.该方法已成功地应用于盐酸黄连素片剂中盐酸小檗碱的测定.     

铈（Ⅳ）-罗丹明6G化学发光体系测定中药清咽片中没食子酸

研究在硫酸-盐酸介质下,没食子酸与铈(Ⅳ)和罗丹明6G体系的化学发光行为,并对影响化学发光强度的诸因素进行试验和探讨,据此建立了流动注射化学发光法检测没食子酸的新方法.检测的线性范围为1.0×10-8～1.0×10-6g/mL;检出限为3.0×10-9g/mL;对浓度为1.0×10-7g/mL没食子酸连续11次测定,其相对标准偏差为2.1%.该方法应用于清咽片中没食子酸含量的测定,结果满意.     

铈(IV)-罗丹明6G化学发光体系测定中药清咽片中没食子酸

研究在硫酸--盐酸介质下,没食子酸与铈(Ⅳ)和罗丹明6G体系的化学发光行为,并对影响化学发光强度的诸因素进行试验和探讨,据此建立了流动注射化学发光法检测没食子酸的新方法.检测的线性范围为1.0×10-8～1.0×10-6g/mL;检出限为3.0×10-9g/mL;对浓度为1.0×10-7g/mL没食子酸连续11次测定,其相对标准偏差为2.1%.该方法应用于清咽片中没食子酸含量的测定,结果满意.     

流动注射化学发光法检测牛奶中青霉素G

基于在酸性的条件下,青霉素G在线降解的中间产物被高锰酸钾氧化产生弱的化学发光,且甲醛的存在对该化学发光有增敏作用,从而建立了一种KMnO_4-HCHO化学发光体系快速检测青霉素G的新方法。化学发光强度与青霉素G的质量浓度在8.0×10~(-7)~8.0×10~(-5)g/mL范围内呈良好的线性关系,R~2=0.998 8,方法的检出限(3σ)为2.4×10~(-7)g/mL,并对浓度1.0×10~(-5)g/mL的青霉素G平行测定11次,其相对标准偏差(RSD)为2.3%,以注射用青霉素G钠和牛奶样作为基体考察,RSD在0.8%~4.1%之间,用标准加入法考察回收率在98.2%~101.8%之间。结果表明,该方法灵敏、准确、可靠,结果令人满意。     

高锰酸钾-硫酸体系流动注射化学发光法测定乙二醛的含量

酸性条件下,高锰酸钾氧化乙二醛产生强烈的化学发光信号,结合流动注射技术,建立了测定乙二醛的化学发光分析法。研究了不同因素对体系产生化学发光信号的影响;探讨了可能的化学发光机理。体系测定的线性范围为2.0×10-5~7.0×10-2g/mL,方法的检出限(3σ)为7×10-6g/mL。对浓度为1.0×10-3g/mL的乙二醛溶液进行了11次平行测定,相对标准偏差为3.8%。将本法应用于模拟样品中乙二醛的分析,结果满意。     

金银花等3种中药材中有机磷农药残留量的测定

对中药材金银花中11种有机磷农药残留量的气相色谱方法进行了研究.样品中的农药采用乙腈-水系统提取,经氮吹浓缩,选用火焰光度检测器(FPD)和DA-5毛细管柱,采用程序升温,气相色谱法检测.方法的最低检出浓度为1.0×10-3～6.0×10-3μg/mL,仪器精密度为1.4%～4.7%;方法精密度为1.2%～6.0%;加样回收率为88.0%～104.6%,RSD值为2.6%～8.9%.用该方法对金银花、泽泻和川芎中有机磷农药残留量进行了测定,结果表明,3种中药材均不同程度地受到有机磷农药的污染,依照《欧洲药典》7.0版农药残留最大限量规定,金银花不合格率为60%,泽泻不合格率为40%,川芎不合格率为10%.     

鲁米诺-Cu(Ⅱ)-盐酸二甲双胍化学发光体系的研究

在Cu(Ⅱ)存在下,研究了luminol-Cu(Ⅱ)-盐酸二甲双胍化学发光体系,建立了测定盐酸二甲双胍的流动注射化学发光新方法.结果表明,在优化的实验条件下,化学发光强度与盐酸二甲双胍浓度在1.0×10-9~1.0×10-7g/mL范围内呈线性关系.该方法测定盐酸二甲双胍的检出限为5×10-10g/mL,相对标准偏差为1.1%(1.0×10-8g/mL盐酸二甲双胍溶液,n=11).该方法已用于片剂中盐酸二甲双胍含量的测定.     

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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