分光光度法测定废水中COD

11220056ANALYSISANDTESTINGTECHNOLOGYANDINSTRUMENTSVolume11Number2June2005(111113)COD(,361000):HACHCOD,,,(n=8)COD.:;HACH;COD:O657.3:B:100623757(2005)0220111203COD,,,,,,.[1]HACH,2545600,,,0.5h.[1],,,HACH,HACH-,,.,,COD,[1].,[2],,,4.[2],HACH([C1-]500mg/L),[1],.11.1HACH2(HACH);45600(HACH).A(COD:0300mg/L):COD(2550100150200250300mg/L)(0.150mol/L);B(COD:3001500mg/L):COD(300500750800100012001500mg/L)(1.000mol/L);(2:8.4g500mL).1.22.0mL(),0.04gHgSO40.3mLH2SO4HgSO4,(0.150mol/L1.000mol/L)017mL,,Ag2SO42H2SO42mL,,45600,146,0.5h,5min,,1/2(1.3.1/1.3.2),,,,COD.:2005201227;:2005205210.:(1966-),,,,.©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(HgSO4),Cl-,Cl-HgSO4,0.04g/2mL[1].COD250mg/LNaCl1.2,:[Cl-]2100mg/L;[Cl-]21002500mg/L,COD10%.NO-22N,10mg/mgNO-2N.HACH:[Cl-]500mg/LCOD.2.41,0.5h.1Table1Effectofreturnsealedtimeofdifferentsamples/minCOD/(mg/L)10223206029815415240229033916530249238135917160249238236017290251238036017312025023803611712.52mL,Cl-2100mg/L,1.2,2.2Table2AnalyticresultsCOD/(mg/L)03003001500COD555710810719619451251482382612161219COD111101160158291299607606103310161430142750505050100100100100200200200200/%1128810410295105959210595107104815%7%3,(),,HACH,COD.,,,,,,.21111©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1],.COD[J].,2001,17(3).[2]GB11914-1989,[S].DeterminationCODinWastewaterUsingSpectrophotometryRAOShao2min(WasterwaterTreatmentPlantofXiamen,Xiamen361004,China)Abstract:ThispaperintroducesanewmethodofdeterminingCODincooledwastewaterusingreturnsealedwithmicro2returnlinebyHACHSpectrophotometer.Experimentalresultsshowedthatthemethodwasrapidandsavedreagent.Thestandarddeviation(n=8)andtherecoveryratemettheneedsofqualitycontroltodetermineCODinwastewater.Keywords:wastewater;HACHspectrophotometer;CODClassifyingnumber:O657.33112:COD©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.