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1、Analyticalchemistry小组成员:刘玉珍黄建菲李恺丹廖石房王广坤1、qualitativeorquantitativeanalysis（定量分析和定性分析）Analyticalchemistrycomprisesthetechniquesandmethodsthatprovideanswerstothequestions"What?"and"Howmuch?"withrespecttothechemicalcompositionofasampleofmatter.分析化学是为物质样本中有什么化学成分和成分有多少的问题提供答案
2、的技术和方法。Theformeristheprovince（范围）ofqualitativeanalysis.Quantitativeanalysisisconcernedwiththeproblemsattendingthedeterminationoftheamountofspeciespresentinagivensample.前者是定性分析的研究范围。定量分析是关注各化学成分在某一个样品中占有多少的测量问题。2、chemicalanalysis,instrumentalanalysis（化学分析，仪器分析）Chemicalanal
3、ysisisbasedonchemicalreactionswhileinstrumentalanalysisreliesuponoptical,electrochemical,andotherphysicalorphysicochemicalpropertiesofsamplesolutions.化学分析根据化学反应，仪器分析依靠光学，电化学时和样品解答其他物理或物理化学的物产。3、mean(arithmeticmean,average),median（平均值（数学平均，平均数）,中位数Themean,arithmeticmean,an
4、daveragearesynonymous同义的termsthatrefertothenumericalvalueobtainedbydividingthesumofasetofreplicate重复measurementsbythenumberofindividualresultsintheset.平均，算术平均，平均数，参考数值除以个别结果集合中的数量测量获得的同义词的总和。Median（中位数）：Inonegroupinorderoftheoddnumber（奇数）ofmeasurements,itisthemiddleofthem
5、easurementsinagroupinorderoftheevennumberofmeasurements,itisthemiddleofthetwomeasurementsthearithmeticaverage（算术平均值).4.precision,absolutedeviation,averagedeviation,standarddeviation（精密度，绝对偏差，平均偏差，标准偏差）a.Precision:（精密度）Itmeanstheagreementbetweenvaluesinasetofdata.Precision
6、isexpressedbyDeviation.（偏差）b.Absolutedeviation（绝对偏差）itissimplythedifferencebetweenanexperimentalvalue（实验值）andthat(of)whichistakenasthebestfortheset(usuallythearithmeticmean).绝对偏差是简单的实验值之间的差异而且是作为算术平均数最佳的发生。c.Averagedeviationitisfoundbysummingtheindividualdeviationsanddivi
7、dingbythenumberofmeasurements.平均偏差是通过总结发现个别偏差和测量次数划分的d.Standarddeviation:5.accuracy,absoluteerror,relativeerror（精确度，绝对误差，相对误差）Thetermaccuracydenotesthenearnessofameasurementtoitsacceptedvalueandisexpressedintermsoferror.Absoluteerroristhedifferencebetweentheobservedvaluea
8、ndtheacceptedvalue,whilerelativeerrorthedivisionoftheabsoluteerrorbytheacceptedvalue.精确度表示的是测量贴近
