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于文涛* 顾 磊 唐美华 方煜宇(,210009) NaNO2,。,NO-2,。525nm;0.57×104Lmol-1cm-1;0.053~24mg/L。1h,,98.8%~102%。 ,,, 2004-05-09;2004-07-191 ,、。、、。,。。、。[1]、[2][3],,[4],。,525nm。,,,,,。2 2.1 DU650(Beckman)。:2g/L;HCl:1mol/L;:10g/L,;:20g/L,;:(,)0.0500g100mL,,,0.5g/L,0.1g/L。,。:。2.2 2g/L3mL25mL,1mol/L6mL,,10g/L2.5mL,,0~15℃5min,20g/L3.0mL,,,50~60℃5min,15min,,1cmDU650420~600nm。525nm。3 3.1 ,,。,,[6],、[7,8],,。5min3320055 (FENXIHUAXUE) ChineseJournalofAnalyticalChemistry 5680~682,。,,β[9]。:3.2 2~6mL,3mL。H2SO4、HCl、HNO3、NaOH,HCl,,NaOH;6mL1mol/LHCl。2~4mL,,2.5mL。2.5~4mL,,3mL。,(、HCl、、),:。3.3 ,0~5℃。,0~15℃,10~15℃;0、5、10min,5~10min,5min;,,,50~60℃5min,15min。,:1h。3.4 、2.2,,4。1。0.1g/L0.0、0.5、1.0、2.0、3.0、4.0、5.06.0mL。y=0.0463x+0.0173,r=0.9995,11,CL=3Sbe/K=5.3×10-5g/L。1 (n=4)Table1 Reproductionexperiments(n=4)Indole(mg/L)AbsorbanceA1A2A3A4ARSD(%)40.18550.19090.17750.18140.18383.180.35840.36870.37180.36130.36511.7120.55820.56220.55430.54280.55441.5160.75240.77030.76110.73760.75541.9200.92150.94200.93560.92880.93191.0241.10201.10961.12121.11841.11280.8 3.5 /,,、、。。、、5-,5-,。2。2 (n=4)*Table2 Effectofothersubstancesonthedeterminationofindole(n=4)*Material(mg/L)Added(%)RecoveryRSD(%)Material(mg/L)Added(%)RecoveryRSD(%)Phenol101.299.90.28-8-Hydroxyquinoline100.099.32.4Pyridine100.397.80.3(3-[2-Aminoethyl]indole40.0100.21.3Aniline100.098.42.15-Serotonin40.0106.50.4Tryptophan40.0101.20.3 *(indole)12mg/L6815: 3.6 ,:500mL1L,400~450mL500mL,pH,500mL。5~10mL2.2,,3。3 Table3 AnalyticalresultsofcoalcokingwastewaterSamplesFound(n=4,mg/L)RSD(%)Added(mg/L)TotalfoundRecovery(%)18.881.24.0012.96102.024.831.24.008.7898.830.822.612.0012.98100.5 References1 LiJiasheng(),HuCaihong().ChineseJ.Anal.Chem.(分析化学),2002,30(6):736~7382 CardosoCAL,VilegasW,HondaN.J.Chromatogr.,1998,808:264~2683 HuiF,Ekborg-OttKH,ArmstrongDW.J.Chromatogr.,2001,906(1~2):91~1034 HuYonghong(),OuyangPingkai(),YangWenge().ChineseJ.Anal.Chem.(分析化学),1994,22(10):10835 AhmadK,HassanI,BashirWA.Analyst(London),1986,111(2):243~2446 WuhanUniversity().AnalyticalChemistry(分析化学).Beijing():People′sEducationPress(),1978:2827 ZiFenglan(),ZhouYinzhuang(),LiuShuncheng().ChineseJournalofCapitalNormalUniversity(首都师范大学学报),1996,17(1):56~598 LiChangxuan(),WangYanlin(),LiuZhiguo(),ChenJinchi(),XuTingbi().FineChemicals(精细化工),1995,12(2):57~599 XuShouchang().OrganicChemistry(有机化学).Beijing():HigherEducationPress(),1993:42110 ZhouChunlong().AcidDyesandAcidMordantDyes(酸性染料及酸性媒介染料).Beijing():ChemistryIndustryPress(),1989:59~98NovelMethodforSpectrophotometricDeterminationofIndoleinCoalCokingWastewaterYuWentao*,GuLei,TangMeihua,FangYuyu(CollgeofLifeScienceandPharmacy,NanjingUniversityofTechnology,Nanjing210009)Abstract Anovelspectrophtometricmethodforthedeterminationofindoleincoalcokingwastewaterhasbeenproposed.Inthesensitiveandsimplemethod,thesodiumdiphenylaminesulfonatewasoxidedtopurplediphenylbenzidinesulfonicacidwiththereactionofNaNO2inHCImedium,thentheunstableoxidationproductwasfurtherreactedwithNaNO2toformadiazotizedproduct,andthataredcolorwasdevelopedfortheproductoncouplingtoindolethatwasstableforatleast1h.Theabsorptionmaximumwasobservedat525nmandtheapparentmolarabsorptivitywas0.57×104Lmol-1cm-1.Beer′slawwasobeyedovertherangeof0.053~24mg/L.Othermaterialsincoalxokingwastewaterwerefreeofinterferenceonthedetermi-nationofindole,andtherecoverieswere98.8%~102%.Keywords Spectrophtometry,sodiumdiphenylaminesulfonate,indole,coalcokingwastewater(Received9May2004;accepted19July2004)682 33
本文标题:分光光度法测定焦化废水中的吲哚于文涛
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