工业循环水中亚硝酸盐测定优化实验研究_先元华

431220156GuangzhouChemicalIndustryVol.43No.12Jun.2015*644003N－1－－、、、。pH=1.8～2.0pH=1.9N－1－－12－29d4.00mL、10.00mL20min。TQ－9A1001－96772015012－0061－03*2013NY028。1967－。ExperimentalStudyonOptimizationofNitriteDeterminationinIndustrialCirculatingWater*XIANYuan－huaWUXiu－jieSHENHongBiologicalandChemicalEngineeringDepartmentYibinVocationalandTechnicalCollegeSichuanYibin644003ChinaAbstractThesystemonthecontentofnitriteinindustrialcirculatingwaterbyvisiblespectrophotometryN－1－naphthyl－aminelightmethodwasoptimized.Theeffectofsampleacidityreagenttimelinessanddosesamplequantityreactiontimeondeterminationofnitritewereinvestigated.TheresultsshowedthattheacidityofsamplewascontrolledinpH1.8～2thedetectioneffectofnitritewasgoodandtheeffectwasthebestwhenpHwas1.9.ChromogenicagentN－1－naphthyl－12－EthylenediamineDihydrochloridecouldbeusingwithin29daysafterconfiguration4.00mLwasthebestchoicefortheeffectofdetermination.Samplescirculatingcoolingwatercontainingchloraminechlorineandotherimpuritieswouldaffectthetestresults.Thesamplesizeshouldbechosenabout10.00mLappropriately.Nitritecreateddiazoniumsaltthencouplingtoproducereddyethereactiontimeshouldbechosenas20minwasthebest.Keywordsindustrialcirculatingwaternitritedeterminationoptimalconditions1。、2－3。。N－1－－、、4、。5、、6。。HG/T3526－2011、、、、。。11.1pH4－N－1－－12－540nm6220156。1.2AＲ1+94－40.0g100mLAＲN－1－－1210.00g/mLAＲAＲ1+6。40.0±0.5g4－100mL500mL2.00±0.02gN－1－－121000mL。1.3JM51020pH。22.1540nm－1。1Fig.1Thestandardcurveofsodiumnitriteconcentrationsandabsorbance10～60.00μg/mL－y=0.0032x+0.0012Ｒ20.9981。2.2。20.00μg/mLpH1.0、1.2、1.4、1.6、1.8、2.0、2.2、2.4、2.6540nm2。2Fig.2Theimpactofsampleaciditytoexperimentalresults2pH。pH=1.0～1.8pH=1.8～2.0pH2pH=1.8～2.0。pHpH=1.9。2.3。10.00mLpH=1.93。3Fig.3Theimpactofcolordosetoexperimentalresults31.00～4.00mL4.00mL。4.00mL4.00mL。2.4N－1－－12－。、、。20.00μg/mLpH2.0N－1－－12－540nm4。4Fig.4Theimpactofchromogenicagenttimelytotestingeffectiveness40～29d0.24629d0.2460.164。29dN－1－－12－。2.5、Fe3+、。pH=1.9、4.00mL5。51.00～10.00mL43126310.00mL0.733－。。1.00～10.00mL。5Fig.5Thedeterminationresultsofcirculatingwaterwithdifferentsamplingquantitysamples2.6N－1－－。1.0000μg/mL、pH1.9、4.00mL10.00mL6。60～15min20min50min0.249。20～50min。6Fig.6Theimpactofdifferentreactiontimetotestingeffectiveness33.110.00mLAB1.94－4mLN－1－－12－20min540nm1。1Table1Theanalysisdataofnitritecontent/μg/mL123456/μg/mL/%/%A42.742.542.643.142.542.642.670.0730.19B47.647.547.547.647.447.747.550.0710.181AB0.073%0.071%0.19%0.18%。。0.25%。3.2AB20.00ug/mL1.00mL2。2Table2Theanalysisdataafterthestandardadditionexperiment/μg/mL123456/μg/mL/%/%A60.960.660.760.560.760.660.670.0599.42B69.669.569.570.269.469.669.630.0898.522AB0.05%0.08%99.42%98.52%95%。41pH=1.9229d4.00mL310.00mL420min5HG/T3526－2011。1HG/T3516－2011S．2．J．201006121－123．3．J．．201309132－135．4．J．20141187－89．5．J．201412112－114．6．J．2002497－101．