【英文标准名称】:Waterquality-Interlaboratorycomparisonsforproficiencytestingofanalyticalchemistrylaboratories
【原文标准名称】:水质.分析化学实验室的熟练测试用实验室间的比较
【标准号】:ISO/TS20612-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC147
【标准类型】:()
【标准水平】:()
【中文主题词】:认证;化学分析和测试;化学;可比性;定义;效率;实验室间试验;实验室;性能;质量;质量保证;污水;污泥;试验室;测试;水;水质
【英文主题词】:Certification;Chemicalanalysisandtesting;Chemistry;Comparability;Definitions;Efficiency;Inter-laboratorytests;Laboratories;Performance;Quality;Qualityassurance;Sewage;Sludge;Testlaboratories;Testing;Water;Waterquality
【摘要】:ThisTechnicalSpecificationspecifiesthecriteriarelatedtoproficiencytestingbyinterlaboratorycomparisonsinthefieldofwater,wastewaterandsludgeanalysis.Inparticular,itspecifiestherequirementsinrespecttoproficiencytestprovidersandtothedesign,executionandevaluationoflaboratoryproficiencycomparisons.Thisdocumentmaybeusedifthedeterminandsintheinterlaboratorytestmayberegardedascapableofmeasurementwithacertaindegreeofcontinuity.Thisisgenerallythecaseforchemicalconstituentsandphysicochemicaldeterminands,butcontinuitydoesnotalwaysexistinthecaseofbiologicaland/ormicrobiologicaldeterminands.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_45
【页数】:25P.;A4
【正文语种】:英语


【英文标准名称】:StandardPracticefor99%/95%InterlaboratoryDetectionEstimate(IDE)forAnalyticalMethodswithNegligibleCalibrationError
【原文标准名称】:带可忽略校准误差的分析方法用99%95%试验室间检测评估(IDE)的标准实施规程
【标准号】:ASTMD6091-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D19.02
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:分析方法;校准;校准误差;检测;评估;实验室;实验室法
【英文主题词】:criticallimit;detection;detectionlimit;falsedetection;falsenondetection;falsepositive;matrixeffects;statisticaltolerancelimit;truedetection;truenondetection
【摘要】:AppropriateapplicationofthispracticeshouldresultinanIDEachievablebymostlaboratoriesproperlyusingthetestmethodstudied.ThisIDEprovidesthebasisforanyprospectiveuseofthetestmethodbyqualifiedlaboratoriesforreliabledetectionoflow-levelconcentrationsofthesameanalyteastheonestudiedinthispracticeandsamemedia(matrix).TheIDEvaluesmaybeusedtocomparethedetectionpowerofdifferentmethodsforanalysisofthesameanalyteinthesamematrix.TheIDEprovideshighprobability(approximately95%)thatresultvaluesofthemethodstudiedwhichexceedtheIDErepresentpresenceofanalyteinthesampleandhighprobability(approximately99%)thatblanksampleswillnotresultinadetection.TheIDEprocedureshouldbeusedtoestablishtheinterlaboratorydetectioncapabilityforanyapplicationofamethodwhereinterlaboratorydetectionisimportanttodatause.TheintentofIDEisnottosetreportinglimits.1.1Thispracticeestablishesastandardforcomputinga99%/95%InterlaboratoryDetectionEstimate(IDE)andprovidesguidanceconcerningtheappropriateuseandapplication.ThecalculationsinvolvedinthispracticecanbeperformedwithDQCALC,MicrosoftExcel-basedsoftwareavailablefromASTM.1.2TheIDEiscomputedtobethelowestconcentrationatwhichthereis90%confidencethatasinglemeasurementfromalaboratoryselectedfromthepopulationofqualifiedlaboratoriesrepresentedinaninterlaboratorystudywillhaveatruedetectionprobabilityofatleast95%andatruenondetectionprobabilityofatleast99%(whenmeasuringablanksample).1.3Thefundamentalassumptionofthecollaborativestudyisthatthemediatested,theconcentrationstested,andtheprotocolfollowedinthestudyprovidearepresentativeandfairevaluationofthescopeandapplicabilityofthetestmethodaswritten.Whenproperlyapplied,theIDEprocedureensuresthatthe99%/95%IDEhasthefollowingproperties:1.3.1RoutinelyAchievableIDEValue8212;MostlaboratoriesareabletoattaintheIDEdetectionperformanceinroutineanalyses,usingastandardmeasurementsystem,atreasonablecost.Thispropertyisneededforadetectionlimittobepracticallyfeasible.RepresentativelaboratoriesmustbeincludedinthedatatocalculatetheIDE.1.3.2RoutineSourcesofErrorAccountedfor8212;TheIDEshouldrealisticallyincludesourcesofbiasandvariationwhicharecommontothemeasurementprocess.Thesesourcesinclude,butarenotlimitedto:intrinsicinstrumentnoise,sometypicalamountofcarryovererror,plusdifferencesinlaboratories,analysts,samplepreparation,andinstruments.1.3.3AvoidableSourcesofErrorExcluded8212;TheIDEshouldrealisticallyexcludeavoidablesourcesofbiasandvariation,thatis,thosewhichcanreasonablybeavoidedinroutinefieldmeasurements.Avoidablesourceswouldinclude,butarenotlimitedto:modificationstothesample,measurementprocedure,ormeasurementequipmentofthevalidatedmethod,andgrossandeasilydiscernibletranscriptionerrors(providedtherewasawaytodetectandeithercorrectoreliminatethem).1.3.4LowProbabilityofFalseDetection8212;TheIDEisatrueconcentrationconsistentwithameasuredconcentrationthreshold(criticalmeasuredvalue)thatwillprovideahighprobability,99%,oftruenondetection(alowprobabilityoffalsedetection,945;=1%).Thus,whenmeasuringablanksample,theprobabilityofnotdetectingtheanalytewouldbe99%.Tobeuseful,thismustbedemonstratedfortheparticularmatrixbeingused,andnotjustforreagentwater.1.3.5LowProbabilityofFalseNondetection8212;TheIDEshouldbeatrueconcentrationatwhichthereisahighprobability,atleast95%,oftruedetection(a......
【中国标准分类号】:A50
【国际标准分类号】:17_020
【页数】:13P.;A4
【正文语种】: