污水中总氮测定的紫外分光光度法的研究

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1、AbstractAbstractTNiSmainmeasureindicatorofeutrophication．andUVspectrophotometryiSoneofmostcommonlyusedmethodsofTN’Sdetermination．However,thedetermination1imitofspectrophotometryisnothigh，anditcannoteliminatetheinterferenceofiodineionsandbromineionseffecti

2、vely．ThisstudieshowtopapermainlyimprovetheUVspectrophotometry,howtoimprovethedeterminationlimitofTN，howtoeliminateinterferenceofiodineionsandbromineionsandhowtoimprovetheefficiencyofT1、Jdetermination．Intheofprocessstudy,foundthattheprocessofnitrogen’Sdige

3、stioninthesewagespendsa10toftime，andthatitisdifficulttodetermineweatherithasbeendigestedcompletely．Afteranalysiscarefully,wefoundthatdual-wavelengthmethodCanrapidlydeterminatethecontentofnitrateandnitriteinthewater,andthatinsomecasesyouCanusethedual-wavel

4、engthmethodtodeterminewhethertheprocessofdigestioniscompletelyquickly．Theresultofexperimentalshowsthemethodissimple，determinationhasahigheraccuracy,andthatitcanmeettherequirementsofaccuracyinthetestandanalysisprocess．Toeliminatetheinterferenceofiodineions

5、andbromineionsandimprovethedeterminationlimitofTN，establishpredictionmodelofTNbasedonBPneuralnetwork．ThepredictionmodeltrainedCaneliminatetheinterferenceofiodineionandbromineioneffectivelyandimprovethedeterminationlimitofTN．WhentherangeoferroriSlimitedwit

6、hin2％，thedeterminationlimitofTNiS6mg／L，andwhentherangeoferroriSlimitedwithin8％，thedeterminationlimitofTNislOmg／L．IfthepredictionmodelCanbetrainedbymorespectrumdata,thepredictionmodelwillbeenmoreaccurate，theperformanceofforecastwillbebetter．Thereisalargenu

7、mberofdatageneratedintheexperiment．Inordertomanageandorganizethesedataeffectively,storedatainAccessdatabase．Toensuredatasecurity,andtomakeiteasyforusertomodifythedataandquerythedata,developaprogrambasedonMicrosoft’SADOtechnology．UserCanmodifyandquerytheda

8、taeasilybytheprogram．TheprogramCandrawspectralcurvebyspectrumdata．Andtheprogrammakesiteasytomanageandorganizedata．Keywords：TN；UVspectrophotometry；BPneuralnetwork；dual—wavelength；ADO；AccessdatabaseII目录目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯