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【英文标准名称】:StandardTestMethodforDeterminationofTurbidityBelow5NTUinStaticMode
【原文标准名称】:静态模式下低于5NTU的浑浊度的测定的标准试验方法
【标准号】:ASTMD6855-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D19.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:calibration;calibrationturbiditystandard;calibrationverification;measurement;nephelometricturbidity;ratioturbidity;turbidimeter;turbidity;turbiditystandards;Calibration--wateranalysisinstrumentation;Nephelometricturbidity;NTU(nephelo
【摘要】:Turbidityisundesirableindrinkingwater,planteffluentwaters,waterforfoodandbeverageprocessing,andforalargenumberofotherwater-dependentmanufacturingprocesses.Removalisoftenaccomplishedbycoagulation,settling,andfiltration.Measurementofturbidityprovidesarapidmeansofprocesscontrolforwhen,how,andtowhatextentthewatermustbetreatedtomeetspecifications.Thistestmethodissuitabletoturbiditysuchasthatfoundindrinkingwater,processwater,andhighpurityindustrialwater.Whenreportingthemeasuredresult,appropriateunitsshouldalsobereported.Theunitsarereflectiveofthetechnologyusedtogeneratetheresult,andifnecessary,providemoreadequatecomparisontohistoricaldatasets.Table1describestechnologiesandreportingresults(seealsoRefs(1),(2),(3)).Thosetechnologieslistedareappropriatefortherangeofmeasurementprescribedinthismethod.Othersmaycomeavailableinthefuture.Fig.X5.1providesaflowcharttoaidinselectionoftheappropriatetechnologyforlow-levelstaticturbidityapplications.IfadesignthatfallsoutsideofthecriterialistedinTable1isused,theturbidityshouldbereportedinturbidityunits(TU)withasubscriptedwavelengthvaluetocharacterizethelightsourcethatwasused.TABLE1ApplicableTechnologiesAvailableforPerformingStaticTurbidityMeasurementsBelow5NTU1.1Thistestmethodcoversthestaticdeterminationofturbidityinwater(see4.1).1.2Thistestmethodisapplicabletothemeasurementofturbiditiesunder5.0nephelometricturbidityunits(NTU).1.3Thistestmethodwastestedonmunicipaldrinkingwater,ultra-purewaterandlowturbiditysamples.Itistheuser''sresponsibilitytoensurethevalidityofthistestmethodforwatersofuntestedmatrices.1.4ThistestmethodusescalibrationstandardsaredefinedinNTUvalues,butotherassignedturbidityunitsareassumedtobeequivalent.1.5Thistestmethodassignstraceablereportingunitstothetypeofrespectivetechnologythatwasusedtoperformthemeasurement.Unitsarenumericallyequivalentwithrespecttothecalibrationstandard.Forexample,a1.0NTUformazinstandardisalsoequaltoa1.0FNUstandard,a1.0FNRUstandardandsoforth.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.RefertotheMSDSsforallchemicalsusedinthisprocedure.
【中国标准分类号】:H26
【国际标准分类号】:19_100
【页数】:14P.;A4
【正文语种】:英语