順序注射光度分析酸堿滴定系統(tǒng)的研究.pdf

1、東北大學碩士學位論文順序注射光度分析酸堿滴定系統(tǒng)的研究姓名：王偉申請學位級別：碩士專業(yè)：分析化學指導教師：范世華20041101東北大學碩士學位論文AbstractStudiesonSequentialInjectionBaseacidTitrationSystemwithSpectrophotometryAbstractAnewspectrophotometricsequentialinjection(SI)baseacidtitra

2、tionsystemwasdevelopedforthedeterminationofdiferentkindsofstrongacidweakacidstrongbasecarbonateandhydrogencarbonateusingbromothymolblueasindicatorfirstly.Thesamplessuchashydrochloricacidsodiumhydroxidevinegardrinkcalcine

3、dsodaandsodiumbicarbonateweretitrateddeterminedbyaspectrophotometricsequentialinjectionsystem.Theresultsevaluatedwithmanualtitrationmethodbyttestat95%confidencelevelwerenotsignificantlydiferent.Inthefirstsectionareviewon

4、thedevelopmentoftitrationusingflowinjectionsystemsequentialinjectionsystemandmultisyringeflowinjectionanalysis(MSFIA)wasmade.Theemphasiswasputontheapplicationofsequentialinjectiontitrationindiferentareas.Inthesecondsecti

5、onanintroductionofmyworkaboutthestrongacidandweakacidtitratedbyaspectrophotometricsequentialinjectionsystemwasmadeusingbromothymolblue(BTB)asindicator.Thehydrochloricacidsampleswerefirstlytitratedagainstsodiumhydroxidezo

6、necontainedBTB.ThechangeoftheBTBcolorwasmonitoredat620nm.Fourlinearrelationshipsbetweenthepeakareaandthelogarithmofacidconcentrationwereobtainedintherangeof4.0x10“53.OOmo1Lhydrochloricacid.Theinfluenceofwavelengthreactio

7、ncoillengthcarrierstreamflowrateacidandbasezonevolumestitrantconcentrationandBTBvolumeontherangeofthemethodwerestudiedtoobtainanoptimum.Thesamplefrequencywas30samples.h“1.Secondlytheaceticacidandcitricacidweretitratedbas

8、edonthehydroxideacidexperimentswiththesameindicatorandthewavelengthetc.Threelinearrelationshipsbetweenthepeakareaoftheunreactedbaseandlogarithmoftheacidconcentrationwereobtainedintherangesof0.202.Omo1LaceticacidI.Ox1041.