ASTM D3370-2008 从关闭水管中的抽取水样的标准实施规程

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【英文标准名称】:StandardPracticesforSamplingWaterfromClosedConduits
【原文标准名称】:从关闭水管中的抽取水样的标准实施规程
【标准号】:ASTMD3370-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D19.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:backpressureregulator;pressurereducer;samplecooler;sampling;samplingequipment;variablerod-in-tubeorifice;water;Backpressureregulator;Chelation;Closedconduits;Equipment(forsamplingwater);Fieldtesting--water;Graphitefurnacea
【摘要】:Thegoalofsamplingistoobtainforanalysisaportionofthemainbodyofwaterthatisrepresentative.Themostcriticalfactorsnecessarytoachievethisarepointsofsampling,andmaterialsselection,systemdesign,timeofsampling,frequencyofsampling,andproperprocedurestomaintaintheintegrityofthesamplepriortoanalysis.Homogeneityoftheprocesstobesampledisfrequentlylacking,necessitatingmultiple-pointsampling.Ifitisimpracticaltoutilizeamost-representativesamplingpoint,itmaybepracticaltodetermineandunderstandinterrelationshipssothatresultsobtainedataminimumnumberofpointsmaybeusedtocharacterizethesystem.Samplescollectedfromasinglepointinasystemarealwaysrecognizedasbeingnon-representativetosomedegree.Forthisreason,totalrepresentativenessofsamplescannotbeaprerequisitetotheselectionofasamplingpoint.Thedegreeofrepresentativenessofthesampleshallbeassessedandtheassessmentmadeapartofthepermanentrecord.Thiswillpreventanartificialdegreeofaccuracyfrombeingassignedtothedataderivedfromtestsonthesample.Thesamplesshallbeofsufficientvolumeandshallbetakenfrequentlyenoughtopermitreproducibilityoftestingrequisiteforthedesiredobjective,asrequiredbythemethodofanalysistobeused.LaboratoriesorfacilitiesconductingwatersamplingshouldbeincompliancewithGuideD3856.1.1Thesepracticescovertheequipmentandmethodsforsamplingwaterfromclosedconduitssuchasprocessstreamsatpowerstationsforchemical,physical,microbiological,andradiologicalanalyses.Itdoesnotcoverspecializedequipmentrequiredforanduniquetoaspecifictestormethodofanalysis.Thefollowingareincluded:
Sections
PracticeAx2014;GrabSamples
9to17
PracticeBx2014;CompositeSamples
18to23
PracticeCx2014;ContinualSampling
24to29