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【英文标准名称】:StandardPracticeforUseofaCeric-CerousSulfateDosimetrySystem
【原文标准名称】:高铈-三价铈硫酸剂量测定系统应用的实施规程
【标准号】:ASTMISO/ASTM51205-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E10.01
【标准类型】:(ISO/ASTM)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorbeddose;ceric-ceroussulfatedosimeter;dose;dosemeasurement;dosimeter;dosimetrysystem;electronbeam;gammaradiation;ionizingradiation;irradiation;photons;radiation;radiationprocessing;reference-standarddosimeter;Xrays;ICS
【摘要】:4.1Theceric-ceroussystemprovidesareliablemeansfordeterminingabsorbeddosetowater.Itisbasedonaprocessofreductionofcericionstocerousionsinacidicaqueoussolutionbyionizingradiation(1,4).NOTE3-Theceric-ceroussystemdescribedinthepracticehasceroussulfateaddedtotheinitialsolutiontoreducetheeffectoforganicimpuritiesandtoallowthepotentiometricmethodofmeasurement.Othersystemsusedfordosimetryincludesolutionsofcericsulfateorcericammoniumsulfateinsulfuricacidwithouttheinitialadditionofceroussulfate.Theseothersystemsarebasedonthesameprocessofreductionofcericionstocerousionsbutarenotincludedinthispractice.4.2Thedosimeterisasolutionofcericsulfateandceroussulfateinsulfuricacidinanappropriatecontainersuchasaflame-sealedglassampoule.Thesolutionindicatesalevelofabsorbeddosebyachange(decrease)inopticalabsorbanceataspecifiedwavelengthintheultravioletregion,orachange(increase)inelectropotential.Acalibratedspectrophotometerisusedtodeterminetheabsorbanceandapotentiometer,withaspeciallydesignedcell,isusedtodeterminetheelectropotentialinmillivolts.4.3Thedosimeterresponsehasanirradiationtemperaturedependencesincetheradiationchemicalyield(G~Ce31!)dependsontemperature.ThedependenceofG~Ce31!isapproximatelyequalto-0.2%perdegreeCelsiusbetween0and62癈(3,5,6).Thisirradiationtemperaturedependencehasaslightdependenceontheinitialcerousionconcentration(see10.6.3).4.4Theabsorbeddosetomaterialsotherthanwaterwhenirradiatedunderequivalentconditionsmaybecalculated.ProceduresformakingsuchcalculationsaregiveninASTMPracticesE666andE668andISO/ASTMGuide51261.NOTE4-Foracomprehensivediscussionofvariousdosimetrymethodsapplicabletotheradiationtypesandenergiesdiscussedinthispractice,seeICRUReports14,34,35,and37.1.1Thispracticecoversthepreparation,testing,andprocedureforusingtheceric-ceroussulfatedosimetrysystemtomeasureabsorbeddoseinwaterwhenexposedtoionizingradiation.Thesystemconsistsofadosimeterandappropriateanalyticalinstrumentation.Forsimplicity,thesystemwillbereferredtoastheceric-ceroussystem.Itisclassifiedasareferencestandarddosimetrysystem(seeISO/ASTMGuide51261).Ceric-cerousdosimetersarealsousedastransfer-standarddosimetersorroutinedosimeters.1.2Thispracticedescribesboththespectrophotometricandthepotentiometricreadoutproceduresfortheceric-ceroussystems.1.3Thispracticeappliesonlyto947;rays,Xrays,andhighenergyelectrons.1.4Thispracticeappliesprovidedthefollowingaresatisfied:1.4.1Theabsorbed-doserangeshallbebetween5102and5104Gy(1).1.4.2Theabsorbed-doserateshallbelessthan106Gy/s(1).1.4.3Forradionuclidegamma-raysources,theinitialphotonenergyshallbegreaterthan0.6MeV.Forbremsstrahlungphotons,theinitialenergyoftheelectronsusedtoproducethebremsstrahlungphotonsshallbeequaltoorgreaterthan2MeV.Forelectronbeams,theinitialelectronenergyshallbegreaterthan8MeV.Note18212;Thelowerenergylimitsareappropriateforacylindricaldosimeterampouleof12-mmdiameter.Correctionsfordosegradientsacrossanampouleofthatdiameterorlessarenotrequiredforphotons,butmayberequiredforelectronbeams(2).Theceric-ceroussystemmaybeusedatlowerenergiesbyemployingthinner(inthebeamdirection)dosimetercontainers(seeICRUReport35).1.4.4Theirradiationtemperatureofthedosimetershallbebetween0and62176;C(3).Note28212;Thetemperaturecoefficientofdosimeterresponseisknownonlyin......
【中国标准分类号】:
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语


【英文标准名称】:Waterquality-DeterminationofdissolvedLi+,Na4+,NH4+,K+,Mn2+,Ca2+,Mg2+,Sr2+andBa2+usingionchromatography-Methodforwaterandwastewater
【原文标准名称】:水质.用离子色谱法测定溶解的Li,Na,NH,K,Mn,Ca,MgSr和Ba含量.水和废水法
【标准号】:BSENISO14911-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-10-15
【实施或试行日期】:1999-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:水质试验;水污染;水质;锂;锶;钾;镁;锰;阳离子;钠;色谱法;钡;含量测定;化学分析和试验;钙;水;高效液相色谱分析法;质量;水常规(实验);规范(验收);试验
【英文主题词】:Barium;Calcium;Cations;Chemicalanalysisandtesting;Chromatography;Determinationofcontent;HPLC;Lithium;Magnesium;Manganese;Potassium;Quality;Sodium;Specification(approval);Strontium;Testing;Water;Waterpollution;Waterpractice;Waterquality;Watertesting
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthedissolvedcationsLi,Na,NH4,K,Mn,Ca,Mg,SrandBainwater(e.g.drinkingwater,surfacewater,wastewater).Anappropriatepretreatmentofthesample(e.g.dilution)andtheapplicationofaconductivitydetector(CO)maketheworkingrangesgivenintable1feasible.Theapplicabilityofthemethodforwastewatersamplesshouldbeprovedineachcase.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:28P.;A4
【正文语种】:英语