分析化学英文ppt

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分析化学英文课件10分光光度法 Spectrophotometry

分析化学英文课件10分光光度法 Spectrophotometry

2.Molar absorptivityε
(1) Characteristic constant under certain condition for a
certain substance.
(2) Not change with c and wave path b. Under certain
temperature and wave length,εis only decided by the
c: concentration, g·L-1
a: absorptivity, L·g-1·cm-1
a andε: a =ε/ M (M : molar mass)
Transmittance: T
T : ratio of the radiant power transmitted to the incident radiant power :
ε = (6~10)× 104 : high sensitive;
ε = (2~6)× 104 : medium sensitive
ε < 2 × 104
: not sensitive。
Discrepancy of Lambert-beer’s law
The relationship between the absorbance and concentration may be nonlinear, which is the discrepancy of Lambert-Beer’s Law. The discrepancy may be caused by:
The selective absorbance and absorbance
curve
M + h → M*

化学专业英语PPT课件

化学专业英语PPT课件

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Common Transition Elememt
Fe : iron ['aɪən] Mn : manganese ['mæŋgəniːz] Cu: copper ['kɒpə] Zn: zinc [zɪŋk] Hg: mercury ['mɝkjəri] Ag: silver ['sɪlvə] Au: gold [gəʊld]
IIIA B Boron ['bɔːrɒn] Al Aluminium [æl(j)ʊ'mɪnɪəm] Ga Gallium ['gælɪəm] In Indium ['ɪndɪəm] Tl Thallium ['θælɪəm]
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P-block Element
IVA
C Carbon['kɑːb(ə)n] Si Silicon['sɪlɪk(ə)n] Ge Germanium[dʒɜː'meɪnɪəm] Sn Tin[tɪn] Pb Lead[liːd]
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例句:
李商隐:“春蚕到死丝方尽” • 科学翻译:Spring silkworm spins silk till
its death. • 文学翻译:Spring silkworm till its death
spins silk from lovesick heart.
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科技英语的特点
(一)语法特点(有四多) 1.词类转换多
操作机器需要懂得机器的性能。 (n.→v.)
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2. 被动语态多
这是因为科技人员最关心的是行为、活动、事 实本身,至于谁做的,无关紧要。运用被动语 态显得文章所描述的内容更客观,可减少一些 主观印象,意思表达简洁明了。 例如:

Analytical-ChemistryPPT课件

Analytical-ChemistryPPT课件

violent.
孙悟空破炉而出之后为何变得狂暴呢?因为他身上的碳酸钙变成了氧化钙,
吸收空气中的水分发生化学反应会发热,故而狂暴。
Then why Sun Wukong became mild? Because the Buddha[佛祖]
gave pressure to Sun Wukong with the five mountain, and
again.
后来孙悟空为啥又温和了呢?因为如来佛祖把孙悟空压在五行山下,常年风
吹日晒,孙悟空身上的氧化钙又吸收了雨水,随后变成了氢氧化钙,所以性
情也就变的温和了。
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7
It is generally believed that the development of analytical chemistry subjects experienced three great change.
Because calcium carbonate [碳酸钙]in his body turned into calcium
oxide[氧化钙], the calcium oxide[氧化钙] took in the moisture[水分] in
the air ,and then produced chemical reaction, so he became
content of the component or the substance, to determine the
structure of the substance (chemical structure, crystal struct ure, spatial distribution)and existing form (valence state, coordination state, crystalline) and the relationship b etween material nature and itself. Its main aim is structural analysis,

《分析化学》第二版、全册教材完整课件(905张PPT)

《分析化学》第二版、全册教材完整课件(905张PPT)
四、按数量级分类
进展
2018/5/16
一、分析化学的分类
1. 按分析任务分类
(1) 定性 含何种元素,何种官能团 (2) 定量 含量 (3)结构 形态分析,立体结构,结构与活性
2018/5/16
5
2. 按分析对象分类
(1) 无机分析 (2) 有机分析 (3) 生物分析 (4) 药物分析
5
2018/5/16
3. 按分析方法分类
化学分析:
重量分析 容量分析(各种滴定分析)
仪器分析:
电化学分析
光化学分析
色谱分析 波谱分析
2018/5/16
5
4.按数量级分类
常量,微量,痕量(10-6),超痕量(10-9~10-12)
克 毫克 10-3 微克 10-6 ppm 纳克 10-9 ppt 皮克 10-12 ppb 飞克 10-15
1.由分析对象来看
无机物分析
有机物 分析
微量 痕量
生物活性物质
2.由分析对象的数量级来看
常量 分子水平
3.由分析自动化程度来看
手工操作
2018/5/16
仪器
自动
全自动
智能化仪器
第一个重要阶段:
◈20世纪二三十年代利用当时物理化学中的溶 液化学平衡理论,动力学理论,如沉淀的生成 和共沉淀现象,指示剂作用原理,滴定曲线和 终点误差,催化反应和诱导反应,缓冲作用原 理大大地丰富了分析化学的内容,并使分析化 学向前迈进了一步.
2018/5/16
第一章 绪 论
一、分析化学的定义
第一节 分析化学的作用
二、分析化学的特点 三、分析化学的作用
2018/5/16
一 、分析化学定义

化学专业英语课件PPT

化学专业英语课件PPT

we are at once aware of the general properties of the
compound. A great many of the compounds we are to study
may be classified as acids, bases, salts, metallic oxides, or
• a great (good)many of 很多,大量
我们将要研究的众多化合物可以分类为酸、碱、盐、 金属氧化物或非金属氧化物。这五类化合物中的前三类 --酸、碱和盐--是最重要的。
2021/3/10
10
2. When an acid, base, or salt is dissolved in water the resulting solution is a conductor of the electric current and is termed an electrolyte. If no conduction of current occurs, the compound is known as a nonelectrolyte.
Lesson 2
THE CLASSIFICATION OF INORGANIC COMPOUNDS
无机化合物分类
2021/3/10
1
词汇
chemist 化学家
equation 方程式
become 适合,与……相称 aqueous 水的
radical 基,根,原子团的,酸性的
to the chemist today. It would be impossible to learn properties
and behavior of even a fraction of this number if it had to be

分析化学英语全解

分析化学英语全解

I. vocabularyabsorbance吸光度absorption 吸收acetic acid 乙酸acetone 丙酮acetonitrile 乙腈aliquot 等份(试液)aluminum foil 铝箔American Chemical Society (缩写ACS) 美国化学会ammonium acetate 乙酸铵analyst 化验师,化验员analytical chemistry 分析化学aqueous 水的,含水的argon 氩(气)autosampler 自动进样器beaker 烧杯bibliography 参考书目blender 混合器,搅拌机buffer solution 缓冲溶液burette 滴定管cartridge 柱管centrifugation 离心Chemical Abstracts (缩写CA) 化学文摘chemical analysis 化学分析chromatograph 色谱仪chromatogram色谱图cloud point extraction(缩写CPE)浊点萃取collision gas 碰撞气confidence level 置信水平conical flask 锥形瓶cone voltage 锥电压daughter ion 子离子desolvation gas 脱溶剂气derivatization 衍生化,衍生(作用)dichloromethane 二氯甲烷Diode array detector (缩写DAD)二极管阵列检测器dilution 稀释(n.)disperser solvent 分散剂dispersive liquid–liquid microextraction 分散液液微萃取distilled water 蒸馏水dropping pipet 滴管electrochemical analysis电化学分析electrode 电极electrolyte 电解质electromagnetic spectrum 电磁波谱electrospray ionization (缩写ESI ) 电喷雾离子化eliminate 消除(v.)eluate 洗出液eluent 洗脱剂elute 洗脱(v.)elution 洗脱(n.)Encyclopedia of analytical chemistry 分析化学百科全书The Engineering Index (缩写EI )工程索引enrichment factor 富集因子Evaporative Light Scattering Detector (缩写ELSD) 蒸发光散射检测器extract 萃取(v.)、萃取物(n.)extraction efficiency 萃取效率filter 过滤(v.)、过滤器(n.)filtrate 滤出液filtration 过滤fluorescence荧光fluorometry荧光分析法formic acid 甲酸funnel 漏斗gas chromatography–mass spectrometry (缩写GC–MS) 气相色谱-质谱gas chromatography coupled to tandem mass spectrometry (缩写GC–MS/MS)气相色谱-串联质谱gel filtration chromatography凝胶过滤色谱法gel permeation chromatography凝胶渗透色谱法graduated cylinder 量筒high performance liquid chromatography (缩写HPLC) 高效液相色谱homogenate 匀浆(n.)homogenize 使均质,将……打成匀浆hydrophobic 疏水的identification 鉴定Impact Factor影响因子incubation time 温育时间Index to Scientific Technical Proceedings (缩写ISTP)科技会议录索引indicator 指示剂instrumental analysis 仪器分析inter-day precision 天间精密度intra-day precision 天内精密度interference 干扰internal standard 内标ion exchange chromatography离子交换色谱法ion source 离子源limit of detection (缩写LOD)检出限limit of quantitation (缩写LOQ)定量限linearity 线性linear range 线性范围linear regression equation 线性回归方程liquid chromatography tandem mass spectrometry (缩写LC-MS/MS)液相色谱串联质谱liquid chromatography with electrospray ionization tandem mass spectrometry (缩写LC-ESI-MS/MS)液相色谱电喷雾串联质谱liquid-liquid partition chromatography 液液分配色谱法liquid-solid adsorption chromatography 液固吸附色谱法mass analyzer 质量分析器Mass Spectrometer 质谱仪mass spectrum 质谱图mass-to-charge ratio 质荷比matrix effect 基质效应maximum absorption 最大吸收maximum value 最大值measuring pipet 吸量管methanol 甲醇micelle 胶束microwave assisted extraction 微波辅助提取minimum value 最小值mobile phase 流动相molar concentration摩尔浓度molarity 摩尔浓度mole 摩尔monograph专著Multiple-reaction monitoring 多反应监测(缩写MRM)negative ionization mode 负离子(化)模式nitrogen 氮(气)normal phase liquid chromatography正相液相色谱法nominal concentration 标示浓度optimization 优化outlier 离群值parent ion 母离子pipette 移液管polycyclic aromatic hydrocarbons 多环芳烃positive ionization mode 正离子(化)模式potentiometry电位法preconcentration 预浓缩precursor ion 前体离子(又称母离子)primary literature一次文献product ion 产物离子(又称子离子)quadrupole-time-of-flight mass spectrometry 四极杆-飞行时间质谱(缩写Q-TOF MS)qualitative analysis 定性分析quality assurance and quality control (缩写QA/QC)质量保证和质量控制quantification 定量quantitative analysis 定量分析reconstitute 重组、复溶(v.)recovery 回收率refractive index detector 折光指数检测器,示差折光检测器relative abundance 相对丰度relative standard deviation (缩写RSD)相对标准偏差reproducibility 重现性reversed phase liquid chromatography(缩写RPLC)反相液相色谱法Royal Society of Chemistry(缩写RSC)英国皇家化学会Science Citation Index (缩写SCI )科学引文索引Science Citation Index Expanded (缩写SCIE) 科学引文索引扩展版Scientific notation 科学计数法signal to noise ratio (缩写S/N)信噪比size exclusion chromatography尺寸排除色谱法secondary literature二次文献solid-phase extraction (缩写SPE)固相萃取solid-phase microextraction (缩写SPME)固相微萃取spike 添加(v.)standard solution标准溶液stationary phase 固定相stirring bar 搅拌棒stoichiometric point化学计量点surfactant 表面活性剂supernatant 上清液syringe 注射器tap water 自来水Teflon 聚四氟乙烯tetrahydrofuran 四氢呋喃titrant 滴定剂titration滴定trace analysis 痕量分析Ultra performance liquid chromatography (缩写UPLC) 超高效液相色谱Ultraviolet/Visible Spectrophotometry 紫外/可见分光光度法vacuum 真空vessel 容器volumetric flask 容量瓶volumetric analysis容量分析法voltammetry 伏安法nanometer 纳米(nm)microgram 微克( g)picogram 皮克(pg)milligram 毫克(mg)femtogram 飞克(fg)II. Terms and their definitionsAccuracy 准确度A measure of the agreement betweenan experimental result and its expected value. Analysis 分析A process that provides chemical or physicalinformation about the constituents in the sampleor the sample itselfAnalyte 被测物,被分析物The constituent of interest in asampleCalibration curve 校准曲线The result of a standardizationshowing graphically how a method’s signalchanges with respect to the amount of analyte. Calibration method 校准方法The basis of quantitative analysis:magnitude of measured property is proportional toconcentration of analyteChromophore 生色团 A functional group which absorbs acharacteristic ultraviolet or visible wavelength Gradient elution 梯度洗脱The process of changing the mobilephase’s solvent strength to enhance the separationof both early and late eluting solutes. Gravimetric analysis重量分析A type of quantitative analysis in whichthe amount of a species in a material is determinedby converting the species into a product that can beisolated and weighed.Isocratic elution 等度洗脱the use of a mobile phase whosecomposition remains constant throughout theseparation.Matrix 基质All other constituents in a sample except forthe analytesMethod blank 方法空白A sample that contains all componentsof the matrix except the analyte.Outlier 离群值Data point whose value is much larger orsmaller than the remaining data.Precision 精密度An indication of the reproducibility of ameasurement or resultQuantitative analysis 定量分析The determination of the amount of asubstance or species present in a material. Quantitative transfer 定量转移The process of moving a sample fromone container to another in a manner that ensures allmaterial is transferred.Selectivity 选择性 A measure of a method’s freedom frominterferences as defined by the method’s selectivitycoefficient.Significant figures 有效数字The digits in a measured quantity,including all digits known exactly and one digit (thelast) whose quantity is uncertain. Spectrophotometry 分光光度法. An analytical method that involveshow light interacts with a substanceStock solution 储备液 A solution of known concentrationfrom which other solutions are prepared. Titration curve 滴定曲线 A graph showing the progress of atitration as a function of the volume of titrant added. Validation (方法)确证,验证The process of verifying thata procedure yields acceptable results.Titration error 滴定误差The determinate error in a titration due tothe difference between the end point and theequivalence point.Robust method 广泛适用的方法A method that can be applied toanalytes in a wide variety of matricesRugged method 稳健的方法 A method that is insensitive to changes inexperimental conditionsMass Spectrometry 质谱法An analytical method which is based on ionization ofgas phase molecule followed by analysis of the masses of theions producedIII. Common knowledges1.Some key journals in Analytical Chemistry:Analytical ChemistryTrends in Analytical ChemistryJournal of Chromatography AJournal of Chromatography BAnalystAnalytica Chimica ActaTALANTACritical Reviews in Analytical ChemistryAnalytical and Bioanalytical ChemistryELECTROPHORESIS2. Types of articles published in scientific journals:Full Length Research PapersRapid CommunicationsReviewsShort CommunicationsDiscussions or Letters to the Editor(Some journals publish all types of articles, while others are devoted to only a single type.)3. The structure of a scientific paper:•Title•Authors (with affiliations and addresses)• Abstract (summary)• Key words•Introduction•Experimental•Results and discussion•Conclusion•Acknowledgement•References4. How to Read a Scientific Paper:Five Helpful Questions•1) WHY did they do this set of experiments?•2) HOW were the experiments actually done?•3) WHAT are the results?•4) WHAT can be concluded from the results?•5) Did they do everything correctly?5. Five-step analyzing process1) Identify and define the problem.2) Design the experimental procedure.3) Conduct an experiment and gather data.4) Analyze the experimental data.5) Report and suggestion.6.What are the main parts of a mass spectrometer?1)sample introduction system2)ion source3) mass analyzer4)detector5)vacuum system。

分析化学完整版课件

分析化学完整版课件

误差的表示方法
1.绝对误差:(absolute error) =x-
x> 为正误差,x< 为负误差 2.相对误差:(relative error)
(/)100%
例题:某人称量真实值为0.0020g 和0.5000g 的 两个样品,称量结 果分别为0.0021g和0.5001g。计算 绝对和相对误差。
•对化学物质的测定 化学和生物活 性物质瞬时跟踪监测和过程控制
•解析型分析策略 整体型综合分 析策略(分析完整的生物体内的基因、 蛋白质、代谢物、通道等各类生物元 素随时间、空间的变化和相互关联, 获取复杂体系的多维综合信息)
•提高选择性、灵敏度和智能化水平
第三节 分析化学的方法分类
1. 按照分析任务分类
4.10(-0.02) 0.0050(+0.0001)/1.97(-0.04)
解:R=4.10×0.0050/1.97=0.0104 SR/R=[(-
0.02/4.10)2+(0.0001/0.00500)2 + (-0.04/1.97)
五、提高分析结果准确度的方法
方法选择 减小测量误差 增加平行测定次数,减小偶然误差 消除测量中的系统误差
小结绝对误差和相对误差系统误差和偶然误差定义特点来源等精密度的表示方式以及相互间的运算准确度与精密度的关系误差的传递提高分析结果准确度的方法有效数字及其运算法则有效数字的判断有效数字的修约有效数字的运算规则有限量测量数据的统计处理统计概念回顾正态分布t分布总体均数的区间估计数据统计检验的基本步骤相关与回归第三章滴定分析法概论anintroductiontotitrimetricanalysis滴定分析将一种已知准确浓度的试剂溶液标准溶液滴加到被测物质的溶液中根据所加试剂溶液的浓度和体积计算出被测物质的量

分析化学中英课件资料

分析化学中英课件资料

食品分析
社会
社会需要
分析化学与社会和其它
其它科学技术领域
科学技术领域的关系
研究与发展
分析问题
分析化学
2018/10/23
ANALYTICAL CHEMISTS IN INDUSTRY - INTERFACES
Lawyers Peers, Supervisors Technical reps In field Other chemists Colleges Universities Health & Safety Production plants
2018/10/23
Chapter 1 Introduction
§1.1 Generalization §1.2 Classification of Ana. Chem. §1.3 Development of Ana.Chem.
2018年10月23日1时3分
§1.1 Generalization
2018/10/23
2018/10/23
课程的任务和要求
掌握基本的分析方法及其原理 掌握有机分子结构解析的基本知识 掌握各种分析方法的有关计算,初步具备 数据评价能力 初步具备查阅文献、选择分析方法、拟订 实验方案的能力 培养观察、分析和解决问题的能力
光化学分析 配位 酸碱 滴定分析 基础发展 化学 分析 仪器 分析 电化学分析 色谱分析
沉淀
氧化还原
质谱分析
热分析 微量、痕量分析
重量分析
分析化学 常量分析 化学 物理、数学 计算机、激光、功能材料
2018/10/23
4、According to size of sample
according to size of sample

分析化学完整版PPT课件

分析化学完整版PPT课件

化学定量分析 :根据化学反应中试样和试剂的用量, 测定物质各组分的含量
化学定性分析:根据分析化学反应的现象和特征鉴定 物质的化学成分
滴定分析(titrimetric analysis )
重量分析(gravimetric analysis)
第一章 绪 论
3. 按照分析方法的原理分类(2)
化学分析
仪器分析(instrumental analysis):使用较特殊仪 器进行分析的方法 (以物质的物理或物理化学性质为基
第一章 绪 论
化学分析
作为一门科学的分析化学的形成: 20 世纪初,以溶液四大平衡理论为基础。 化学分析法迅速发展成为系统理论和方 法。
第一章 绪 论
化学分析
以仪器分析为主的现代分析化学:20世 纪40~60年代,物理学与电子学的发展 促进分析化学的发展。光谱分析、极谱 分析及其理论体系。 经济、社会发展的需求是动力
药学专业的重要专业基础课
第一章 绪 论
化学分析
第二节 分析化学的发展
第一章 绪 论
化学分析
分析化学的诞生 :18世纪,在氧化汞 形成实验中的定量测定,拉瓦锡(AL.
Lavoisier) --分析化学之父。
滴定分析的产生:直接动力是化学工业 的兴起。 18世纪时,硫酸、盐酸、苏 打和氯水是化学工业的中心产品。最早 的“滴定分析” ,法国人日夫鲁瓦测 定醋酸的浓度,将醋酸滴加入碳酸钾中。
微量组分分析 (0.01%~1%)
痕量(组分)分析 (<0.01%)
注意与试样用量分类法的区别
第一章 绪 论
化学分析
第四节
分析过程和步骤
第一章 绪 论
化学分析
明确分析任务和制订计划(包括标准操作程序,SOP)

化学专业英语ppt课件

化学专业英语ppt课件

soapy 肥皂般的,滑腻的 slippery 滑的 neutralization 中和 evaporation 蒸发 positive 正的,阳的 positive ion 正离子 negative ion 负离子 lattice 格子,点阵 crystal lattice 晶格 electrovalent 电价的 orient 定向,取向 pattern 模型,形式
4
• thousands and tens of thousands成千上万
The Classes of Compounds Thousands and tens of thousands of compounds are known to the chemist today.
be known to被……所知
幸运的是,大多数化合物能够组合在一起分成几类。
7
Then, if we can properly classify a compound, we are at once aware of the general properties of the compound from knowledge of the properties of that class or group of compounds.
share 共享,分享 transfer 转移 coordinate 配位
coordinate valence 配键 hydronium ion 水合氢离子
citric 柠檬的 citric acid 柠檬酸 citrus 柑桔属
lactic 乳的 lactic acid 乳酸
2
litmus 石蕊 litmus paper 石蕊试纸 dye 染料 soak 浸泡,浸渍 enable 使……能够 indicator 指示剂 methyl 甲基 methyl orange 甲基橙 phenolphthalein 酚酞 react (with, on) 反应 strong acid 强酸 ionize 离子化,电离 bitter 苦味

IntrototheChemistry化学基础知识英文简介PPT

IntrototheChemistry化学基础知识英文简介PPT

Structural formula shows the arrangement of the
atoms in a single molecule
Molecules - example
Glucose Sugar
C6H12O6 Chemical formula
H H C OH
CO
H
H
C OH
OH
C
H HC
• always contain C & H and usually O, N, sometimes S&P
• originate in organisms
• generally complex molecules
Examples of Inorganic Compounds
H + O = H2O = Water H + Cl = HCl = Hydrochloric Acid Na + Cl = NaCl = Common Table Salt
Indefinite Volume
(can expand and be compressed)
Elements one of the 100+ pure substances
that make up everything in the universe
All they are displayed in the Periodic Table of the Elements
Liquid
Indefinite Shape
(takes the shape of the container)
Definite Volume (can not be compressed)

分析化学英文课件02误差与数据处理 Errors and Data Treatment

分析化学英文课件02误差与数据处理 Errors and Data Treatment
§2.4 Ways of Expressing Precision §2.5 The Confidence Limit §2.6 Rejection of a Result §2.7 Significant Figures and
Computation Rules
§2.1 Errors in Quantitative Analysis §2.1.1 Systematic Errors
CV% = S / X Standard deviation is more accurate and scientific than average deviation.
Example: two sets of experimental data
1. X-X: 0.11, -0.73, 0.24, 0.51,
2. Precision──the degree of agreement between the
replicate measurements of the same quantity Precision is expressed by deviation
Deviation is the difference between the individual measurement and the mean of the measurement
lim X n
2. When the measurement time is finite
Standard deviation:
s X X 2 /n 1
The standard deviation is sometimes expressed as the relative standard deviation, which is often called the coefficient of variation(CV)

化学专业英语PPT课件

化学专业英语PPT课件

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15
(二)词汇特点
• 1. 词义专一
文学英语中,经常出现一词多义或一义多词的
现象,科技英语中也不例外,但在表达同一个科 学概念或含义时,一般采用单一词汇。
如: hexachlorocyclohexane 六氯环己烷
• 2. 科技词汇来源于希腊语和拉丁语
据统计,1万个普通英语词汇中,约有46%源于
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2
Why do we learn Special English ?
• 研究生阶段学习与工作--
➢ 英语文献检索、阅读、理解 ➢ 英语报告的汇报、听说 ➢ 英语讨论会、多媒体汇报 ➢ 英语论文撰写、投稿、发表 ➢ GRE考试出国留学
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3
教学内容:
1. 大多数化学元素的名称; 2. 无机化学、有机化学、分析化学、物理化学、以
• chemi(o)-
chemisorb
化学吸收;
chemiluminescence 化学发光;
chemoceptor
化学受体,化学感应器;
chemolysis[ke`mɔləsis] 化学分析
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18
(三)科技英语在修饰上的特点
1. 时态应用有限
叙述过去的研究常用过去时(与现在不发 生联系),也用现在完成时(与现在有直 接联系,并对目前有重要的影响);讨论 推导的理论及结果用将来时;论述理论部 分用现在时。
在翻译过程中将英文中的某种词类 译成汉语中的另一种词类,如名词→ 动词,形容词→动词,动词→名词等 等。
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11
ቤተ መጻሕፍቲ ባይዱ
例如:
The operation of a machine needs some knowledge of its performance.

分析化学 五大版 英文

分析化学 五大版 英文
electrode potential, light absorption or emission, mass-to-charge ratio, fluorescence etc.) are made using instrumentation.
The Role of Analytical Chemistry
• Chromatographic M Nhomakorabeathods: Separation techniques and quantitation is based on calibration curve.
• Electroanalytical Methods: Involve the measurement of electrical properties such as voltage, current, resistance and quantity of electrical charge.
CHEM-3245 Quantitative Analysis
Fundamentals of Analytical Chemistry
Chapter 1 The Nature of Analytical Chemistry
▪Analytical Chemistry deals with methods for
• All branches of chemistry draw on the ideas and techniques of analytical chemistry.
• The interdisciplinary nature of chemical analysis makes it a vital tool in medical, industrial, government and academic laboratories.

分析化学英文课件03滴定分析基础 Fundamentals of Titrimetric Analysis

分析化学英文课件03滴定分析基础 Fundamentals of Titrimetric Analysis
of Standard Solutions §3.4 Calculations in Titrimetric
Analysis
§3.1 General Principlmeosving
§3.1.1 Some General Aspect
In a titration, the test substance (analyte) reacts with a reagent added as a solution of known concentration--refered to as a standard solution, and it is generally added from a buret.
For example, in acid-base titrations, solutions of hydrochloric acid and sodium hydroxide are so prepared, and it is customary to standardize one of them against a secondary standard to obtain the concentration of the other solution.
§3.3 Ways of Expressing Concentration of Standard Solution
§3.3.1Concentration of Amount Substance
——the amount of substance in unit volume
Molarity--a kind of concentration expression. If nB moles of substance B are contained in V liters of solution, the concentration of substance B is given by cB = nB/V, The commonly used unit is mol/L.
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