废水中悬浮物测定(英文版).doc

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1、ExperimentⅠthedeterminationofsuspendedsolidinwastewaterThepurposeandrequirementsoftheexperiment1.Learnthemethodofthedeterminationaboutsuspendedsolid(callSShereinafter);2.Reviewtheusageofanalyticalbalanceandtheerroraboutoperation;3.Knowthemeanofwashingresiduumi

2、nfilter;4.KnowSS’sthedangerandtherelativewithturbidity;Experimentalprogram1.ExperimentalinstrumentsanddrugsFilterpaperandfunnel;Analyticalbalanceandweighingbottle;Dryingoven;WaterofYellowRiver.2.ExperimentalstepsOvendryandweighbeforefilter:chillweighingbottlea

3、ftertakeoutfromdryingoven.Thenweighweighingbottletwicewithfoldedfilterpaper,recordingthedata,andtheD-valuebetweentwotimesmustlessthan0.2mg.Filteringandovendry:takeYellowRiverwater50mL,50mL,100mL,withmixing.Thenrespectivelyfilterthemandwashingwaterofthebeaker.A

4、fterfiltering,washtheresiduumthreetimesinfunnel.Ultimatelytakefilterandremainsintoweighingbottle,andovendrythem1.5hourswith104℃indryingoven.Weighing:whenweighingbottleandremainshavecooled,weighthem,recordingthedata,andtheD-valuebetweentwotimesmustlessthan0.2mg

5、.ExperimentalresultanddatahandlingThedataaboutSS　Weightafterthefirstovendry(g)Weightafterthesecondovendry(g)Residuum(g)massconcentrationofSS(mg/L)50mLwater43.135643.125343.211243.21060.0805161050mLwater44.095444.095944.173244.17390.07791558100mLwater43.586243.

6、585843.798743.79930.21302130AccordingtofollowingformulawecancalculatethemassconcentrationofSSinYellowRiver.Notes:mAreferstothemassofresiduum+filterpaperandweighbottle(g)mBreferstothemassfilterpaperandweighbottle(g)Vreferstothevolumeofwatersample(mL)Conclusion1

7、.DatareliabilityanalysisTheaverageofthemassconcentrationThestandarddeviationofthemassconcentrationTherelativestandarddeviationofdataFromthetable,wecaneasilyseethethirddataiserror.Ifitisright,thedataofresiduuminthirdwatersamplewouldbetwicethanothers.Whenwetooks

8、amples,wehavemixedthewatersamplesandtookthemby50mland100mlpipette,andwehavealsowashedpipette.Soouroperationisn’terrorinphaseoftakingsamples.Butwhenthewaterwasfiltering,wewashedthem