高锰酸盐指数测定中高锰酸钾标准溶液配制中常见问题的探讨与标定方法的改进

295201610POLLUTIONCONTＲOLTECHNOLOGYVol．29No．5Oct．2016211500。X830．3AImprovementofthePreparationandCalibrationofPotassiumPermanganateStandardSolutionintheDeterminationofPotassiumPermanganateCHENYin－huaLiuhedistrictenvironmentalmonitoringstationNanjing211500JiangsuChinaAbstractThedeterminationofpermanganateindexinpotassiumpermanganatestandardsolutionpreparationerrorreasonwereanalyzedinthispaper．Atfirstpotassiumpermanganatestandardreservingsolutioncalibrationtodeterminethedilutionratioareaccuratelypreparedrequiredmethodofpotassiumpermanganatestandardsolution．KeywordsPermanganateindexPotassiumPermanganatePotassiumPermanganatestandardizedsolutionStandardsolutionPreparationCalibration2016－04－292016－05－301976—。mg/L。、、。。《》GB11892－89〈C21/5KMnO40．1mol/L〉3．2g1000mL。90～95℃2h。2d〈C31/5KMnO40．01mol/L〉100．0mL1000mL。。CODMn7．210．00mL4．6、1100℃90～95℃2h·50·.295234。5〈C21/5KMnO40．1mol/L〉〈C31/5KMnO40．01mol/L〉。1HH1000mL250mL25mL。22．1〈C21/5KMnO40．1mol/L〉3．2g51000mL90～95℃2h。2d。1。12．12．112345/mL10001000100010001000/mL6606486646566702．2〈C1/2Na2C2O40．1000mol/L〉0．6705g120℃2h100mL4℃。2．3〈C11/2Na2C2O40．0100mol/L〉100．0mL2．21000mL。32．112．3100．0mL5250mL5mL1+330+2min22．130s2．1V12。22．12．112345/mL1010101010/mL6．656．556．756．606．754〈C31/5KMnO40．01mol/L〉322．1a、b2100mL0．01mol/L。541100．0mL250mL5mL1+310．00mL4。30+2min55201610.·55·。2．3．1。2．3．2、。。2．3．3。。2．3．4、。3檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺檺。50210．00mL2．33430s410．00mL2．3。80℃5430s。V26K=10．00/V2K3。34412345abababababK1111111111K111111111161。1L10mL1+34。100L2360～80℃44。