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1、东华理工大学硕士学位论文requirementsforanalysismethod,whichrealizethesensitiveandaccuratedetectionofmaleicacidinstarchsamples.2.Anovelmethodforthedeterminationoffumaricacidincaoshanhuhanpian,soilandwaterisestablishedbyusingHF-LPME.Byoptimizingthecontrolparameters,suchastheextr
2、actionagent,thepHvalueofsamplesolution,temperature,time,stirringrateandsalteffect,theoptimumconditionsaredetermined.Andthenextractandanalysisundertheoptimumconditions.Theresultsshowthat:fumaricacidhasgoodlinearrelationwithin0.01-1.0mg/L,thecorrelationcoefficientisg
3、reaterthan0.999,therelativestandarddeviationis4.3%(n=11),thedetectionlimitsofmaleicacidis1.28μg/Landtheenrichmentfactorcanachieve46.2times.ThroughthefurtherresearchofenrichmentfactorforLPME,therelationshipbetweenenrichmentratioandtheinitialconcentrationoffumaricaci
4、disfound.Whenthemethodaboveisappliedtothedeterminationresearchoffumaricacidinvarioussamples,therecoveryandprecisioncansatisfytherequirementsforanalysismethod,whichrealizethesensitiveandaccuratedetectionoffumaricacidinactualsamples.3.Anovelmethodforthedeterminationo
5、fmaleicacidandfumaricacidatthesametimeinstarchisestablishedbyusingHF-LPME.Consideringthemicroextractionconditionsoftwoanalytes,theoptimumconditionsaredeterminedfinally.Andthenextractandanalysisundertheoptimumconditions.Theresultsshowthat:thismethodcananalysistwokin
6、dsofcomponentsthathavesimilarnatureatthesametime.Whenthemethodaboveisappliedtothedeterminationresearchofmaleicacidandfumaricacidinvariousstarchsamples,therecoveryandprecisioncansatisfytherequirementsforanalysismethod.Bytheeffectofconcentration,extractionandpurifica
7、tionofLPME,thesensitivityandselectivityisimprovedwhichrealizethesensitiveandaccuratedetectionfortwosubstancesinactualsamplesandprovideanewmethodforsimultaneousdeterminationofvarioussimilarcomponentsinothercomplexsamples.Keywords:hollowfiberliquidphasemicroextractio
8、n,highperformanceliquidchromatography,maleicacid,fumaricacid,starchIV万方数据目录目录摘要..................................................................
