光催化降解过程中苯酚的分光光度法测定

X1,2,1,2,2(1.,210094;2.,222005):,270292nm:99.79%101.17%,0.50%;:99.14%104.75%,2.20%,0.10mgPL:;;;:O657132:A:100020720(2005)1120044204,,,()0.1mgPL[1]12mgPL,,415mgPL,,,[2],,[3],,42,[4],,,1[5],,,ab,,11Fig.1Principlediagramofdouble2wavelengthspectropho2tometryb,a,442411200511ChineseJournalofAnalysisLaboratoryVol.24.No.112005-11X:2004212210;:2005203212:(GY200301):(1956-),,©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Ab1=Ab2),b,12,Ab=Ab1-Ab2=0ab12,a,A=A1-A2=(Aa1+Ab1)-(Aa2+Ab2)=Aa1-Aa2,bAa(2),,,22.1752()(,,):0.2500g(KMnO4,NaOHpH12,),100mL,10mL100mL,,250mgPL(,):0.1000g,,100mL25mL500mL,,50mgPL2.225mL,,,270292nmA1A2,A=A1-A233.13mL5mL25mL,,200400nm2,268nm2Fig.2Absorptionspectraofphenolandquinone1-;2-244nm292270nm,268nm,,270292nm3.23mL,,270292nm,5min,3h3.3100mgPL10mgPL,1molPLHCl1molPLNaOHpH,270292nm,,,35,,270nmpH,pH7.0,,pH10.0pH1.07.0pH10.0,,pH4.07.03.42.2,,542411200511ChineseJournalofAnalysisLaboratoryVol.24.No.112005-11©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(292nm);2-Aa2(270nm);3-Aa=Aa2-Aa14pHFig.4EffectofpHontheabsorbanceofquinone1-Ab1(270nm);2-Ab2(292nm);3-Ab=Ab1-Ab25pHFig.5EffectofpHontheabsorbanceofthemixture1-Ab1(270nm);2-Ab2(292nm);3-Ab=Ab1-Ab2:A=0.01434+0.003700(mgPL)A,r=0.99990.1060.00mgPL3.5,270292nm,5,,11,99179%101.17%,0.50%1Tab.1DeterminationofrecoveryandprecisionforstandardsamplesP(mgPL)P(mgPL)P%P%SRSDP%2019.9699.792020.03100.142019.9699.79100.070.0590.292020.10100.492020.03100.143030.35101.173030.07100.243030.00100.00100.560.140.483030.28100.933030.14100.472Tab.2DeterminationofrecoveryandprecisionforsamplesP(mgPL)P(mgPL)P(mgPL)P%P%SRSDP%13.9841008.03101.2523.9241007.8999.2533.3641007.3399.2542.3841006.5010310051.7541005.80101.2561.2641005.45104.75101.460.0862.1273.98810012.2210310083.85810012.0110210093.01810011.17102100101.8281009.91101.13111.4081009.63102.88121.1381009.43103.75102.460.0740.09::0=60mgPL,:V=200mL,pH710;:TiO2,0.1000g,:100mLPmin,15W,=25417nm642411200511ChineseJournalofAnalysisLaboratoryVol.24.No.112005-11©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,[1],GB3838288,1988[2],,.,1997,20(4):90[3],,.,2002,22():108[4].().:,1989[5],..:,2000SpectrophotometricdeterminationofphenolintheprocessofphotocatalyticdegradationofphenolaqueoussolutionwithnanotitaniaXUGao2yang,SONGHong2chang(NationalSpecialSuperfinePowderofEngineeringandResearchCenter,NanjingUniversityofScienceandTechnology,Nanjing210094),XUGao2yang,JiaHai2hongandCaoLei(DepartmentofChem2icalEngineeringofHuaihaiInstituteofTechnology,Li2anyungang,222005),FenxiShiyanshi,2005,24(11):4447Abstract:Thedouble2wavelengthultravioletspectropho2tometrywasusedtoanalyzethephenolinamixedsolu2tioncontainingbenzoquinoneandphenol.Themethodisfastandsimple.Thedeterminationwavelengthsarese2lectedas270and292nm.Itwasusedforpracticalanalysisintheprocessofphotocatalyticdegradationofphenolaqueoussolutionbynanotitaniawithsatisfactoryresults.Therecoveriesofthestandardsampleswere99179%101.17%,andtherelativestandarddevia2tionwaslessthan0.50%.Therecoveriesofaddedstandardforthesampleswere99.14%104.75%,andtherelativestandarddeviationwaslessthan2120%.Thedetectionlimitofphenolwas0.10mgPL.Keywords:Double2wavelength;Ultravioletspectropho2tometry;Benzoquinone;Phenol742411200511ChineseJournalofAnalysisLaboratoryVol.24.No.112005-11©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.