双波长分光光度法测定废水中痕量铬(Ⅵ)

,2009,29(1):67269MetallurgicalAnalysis,2009,29(1):67269:1000-7571(2009)01-0067-03()31,2,1(1.,466000;2.,477150):H2SO4,()S(ABS),()510nm,575nm,714104Lmol-1cm-1014110g/mL,17122ng/mL(),9517%10312%()():;();S:O657132:A:2008-07-02:(No12008A150029):(1975-),,,,;Tel:[phone],E2mail:chen2yh75@1631com(),,()[1]()[2-4],()[5],[6](,,,)[7]Cr()Cr()[8-9],S(ABS),,(),()(),1111Spectrumlab22pc();();V530()():110mg/mL,017072gK2Cr2O7,,250mL,10g/mL();S:11010-3mol/L,011248gS,250mL,;:9mol/L,11210mL415mL217mL(),,20min,1cm,,510nm,575nm(A1,A2),A=A1-A2,Cr()76©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()inwastewater.MetallurgicalAnalysis,2009,29(1):672692211,,(1)1,575,620nm,510nm620nm,,575nm,510nm,65nm1Fig11Absorptionspectra11415mLH2SO4+21710-4mol/LS(AlizarinblueS);211+015g/mLCr()1212:9mol/LH2SO4415mLA,H2SO4415mL213SS:S217mLA214,,,20min,A5h215n(ABS)n(Cr)=21216,(),014110g/mL,()()(A),A=-0128775+11672,019935,714104Lmol-1cm-13Sb/k(Sb,k)17122ng/mL217,015g/mL(),5%,:EDTA,Na+,F-,SO42-,Cu2+,K+,Cl-(1000);SiO42-,Pb2+,Mn2+,PO43-,CO32-,NO3-(500);Al3+,Mg2+,Ca2+(100);Fe3+(3)Fe3+,1mL1mg/mLNaF3,,11Cr()(n=5)Table1ResultsforthedeterminationofCr()inindustrialwastewatersamplesSample(g/mL)FoundThismethod[5]Nationalstandardmethod(%)RSD(g/mL)Added(g/mL)Totalfound(%)RecoveryElectroplatingeffluent012301244.210120015001420173951710010Electroplatingwaste013101332.76012001500152018010312961886©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.().,2009,29(1):67269:[1],,1[J]1(MetallurgicalAnalysis),2007,27(4):332411[2],,,1VI[J]12(PhysicalTestingandChemicalAnalysis:PartBChemicalAnalysis),2002,38(8):39123931[3],,,1VI[J]1(ChineseJournalofAnalyticalChemistry),2000,28(7):89028921[4],,,1Cr()[J]1(Met2allurgicalAnalysis),2004,24(5):232251[5]GB/T7467-1987:[S]1[6],,,1()[J]1(MetallurgicalAnalysis),2008,28(8):522591[7],1[J].2(PhysicalTestingandChemicalAnalysis:PartBChemicalAnalysis),2007,43:72101[8],1Cr()Cr()[J]1(ChineseJournalofAnalysisLaboratory),2008,27(5):342371[9],1Cr()Cr()[J]1(HeilongjiangScienceandTechnologyInformation),2007:(2):131Dual2wavelengthspectrophotometricdeterminationoftracechromium()inwastewaterCHENYa2hong31,TIANFeng2shou2,MAQing2qing1(1.DepartmentofChemistry,ZhoukouNormalUniversity,Zhoukou466000,China;2.DanchengCaixinChemicalCo1,Ltd1,Dancheng477150,China)Abstract:Anoveldeterminationmethodoftracechromium()inwastewaterbydual2wavelengthspectrophotometrywasestablishedbasedonthefactthatchromium()canreactwithalizarinblueS(ABS)toformredcomplexinH2SO4medium.Thedetectedwavelengthwas510nmwhiletherefer2encewavelengthwas575nm,andtheapparentmolarabsorptivitywas7.4104Lmol-1cm-1.Thelinearityrangeforthedeterminationofchromium()was0.4-1.0g/mL,withthedetectionlimitof17.22ng/mL.Theproposedmethodhasbeenappliedtothedeterminationofchromium()inindustrialwastewaterwiththerecoveryof95.7%-103.2%.Theresultswereincoincidencewiththoseobtainedbynationalstandardmethod(diphenylcarbazidespectrophotometry).Keywords:dual2wavelengthspetrophotometry;chromium();alizarinblueS96©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.