基于ICP-MS的四川荥经砂器微量元素分析

利用电感耦合等离子质谱法(ICP-MS)对荥经砂器3种原料及成品进行了微量元素的测试分析,通过砂器原料中微量元素与一般土壤中微量元素含量的对比分析,以及人食物中的微量元素与砂器样品中微量元素的对比分析,重点对在4种样品中检测出的11种生命必需微量元素和11种生命毒性元素进行了研究.最后通过对比分析得出荥经砂器及原料中含有多种生命必需微量元素,且生命必需微量元素和毒性微量元素普遍低于一般土壤;按最大浸出量计算砂器中生命毒性元素含量大多数在人体正常范围之内.     

ICP法测量吉林省部分地区大米中矿物质的含量

目的用ICP法测定吉林省部分地区大米中矿物质的含量,以了解大米中营养物质的含量情况.方法采用随机抽样的方法对6个地区大米进行采样,我们选用其中部分样品,样品经过湿式消化法消解后,用全谱直读电感耦合等离子体发射光谱仪（即ICP-OES）对大米中主要的无机盐和微量元素进行测定.结果测得样品中无机盐和微量元素的含量情况,大米...     

谢氏宽漠王无机元素和氨基酸组分的测定与分析

对谢氏宽漠王的18种无机元素和18种氨基酸组分进行了分析测定,结果表明:该甲虫含有12种必需微量元素,在样品中的总质量分数达826.93×10-6;蛋白质在样品中的质量分数为49.88×10-2,其中必需氨基酸在蛋白质中的质量分数为0.501.亮氨酸、缬氨酸、甘氨酸、谷氨酸等含量十分丰富,缬氨酸含量突出,在样品中的质量分数高达10.32×10-2.本研究为谢氏宽漠王的组成成分研究提供了基本资料,为进一步探讨其利用价值提供参考.     

海南鸡屎藤微量元素含量的测定

对海南鸡屎藤微量元素的含量进行测定.通过HNO3-HClO4混合酸对样品进行消解6 d,利用火焰原子吸收法分别测定海南毛鸡屎藤和鸡屎藤中K、Mg、Ca、Cr、Ni、Mn、Zn和Cu八种微量元素的含量.两种鸡屎藤中都富含K、Mg、Ca元素,而Ni、Mn、Zn、Cu在毛鸡屎藤茎和叶中的含量都高于鸡屎藤茎和叶中的含量,且含量...     

青海白刺和枸杞微量元素的对应分析

应用对应分析对青海白刺和枸杞中微量元素的分布特征进行了研究.该方法可用于青海白刺和枸杞样品元素分析数据的直接处理,以深入研究这些样品的质量与它们的微量元素组成和样品来源的相关关系.实证分析结果表明,对应分析能够揭示出样品来源与变量之间的内在联系,是一种有优势的分析方法.     

电感耦合等离子体质谱法测定地质样品中35种微量元素

电感耦合等离子体质谱广泛应用于地质样品中的多种微量元素分析.采用封闭压力酸溶法溶解地质样品,以Rh单元素标准溶液作为内标和基体匹配混标溶液作为标准进行样品测定,对国际标准样品监控样35种常用微量元素长期测定结果表明,绝大多数元素测定值与参考值的相对误差小于10%,其中大多数微量元素优于5%.     

矿物中的微量元素对有机质产气的影响

为了深入研究矿物催化作用对有机质产气的影响,采用开放体系下的热模拟实验,在不同温度下对4个样品分别进行了全岩和干酪根生气对比研究.样品中10种微量元素的测定对比结果表明,微量元素中只有钡元素含量与产气率之间具有良好的相关关系(相关系数达到0.91),对有机质生气具有催化作用.无机矿物中微量元素对有机质的产气量和生气高峰有明显的影响,一般来说,无机矿物的存在可以使有机质生气高峰期提前.     

矿物中的微量元素对有机质产气的影响

为了深入研究矿物催化作用对有机质产气的影响,采用开放体系下的热模拟实验,在不同温度下对4个样品分别进行了全岩和干酪根生气对比研究.样品中10种微量元素的测定对比结果表明,微量元素中只有钡元素含量与产气率之间具有良好的相关关系(相关系数达到0.91),对有机质生气具有催化作用.无机矿物中微量元素对有机质的产气量和生气高峰有明显的影响,一般来说,无机矿物的存在可以使有机质生气高峰期提前.     

微波消解-AAS法测芦荟中微量金属元素Zn,Mn,Cd,Pb

0引言 芦荟是一种药用价值很高的植物,广泛应用于医药、保健、美容方面,还可食用.芦荟中除含有蒽醌类和多糖等有效成份,还含有多种微量元素[1].现代药学证明,微量元素与人体健康、生长发育和防病治病、延缓衰老有着密切的关系.在进行芦荟中微量元素测定时,前人多采用湿法消化法处理芦荟样品,比较费时,多有成份损失.本文应用微波消解技术进行芦荟样品中微量元素测定的前处理,取得了良好的效果.     

青海高原不同地区麻花秦艽花中微量元素因子分析

采用因子分析方法对青海高原不同地区麻花秦艽花中微量元素含量数据进行分析,找出了麻花秦艽花中Ca、Mg、Cu、Fe、Mn、Zn6种微量元素之间的关系,运用化学计量学方法,结合SPSS统计软件,对麻花秦艽花中微量元素和中药功效进行研究.结果发现,第1公共因子F1在指标Ca、Mg、Mn上有较大的载荷,第2公共因子F2在指标C...     

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     

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

正~~