【英文标准名称】:Cereals,cereals-basedproductsandanimalfeedingstuffs-DeterminationofcrudefatandtotalfatcontentbytheRandallextractionmethod
【原文标准名称】:谷物,谷物原料产品和动物饲料.兰德尔提取法测定粗脂肪和总脂肪含量
【标准号】:BSENISO11085-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2008-06-30
【实施或试行日期】:2008-06-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;饲料;谷物食品;谷物产品;谷类作物;粗脂肪;定义;含量测定;萃取;脂肪含量;食品管理;食品检验;食品;实验室间试验;研究;实验室试验;数学计算;分析方法;兰德尔
【英文主题词】:Analysis;Animalfeed;Cerealfoodproducts;Cerealproducts;Cereals;Crudefats;Definitions;Determinationofcontent;Extraction;Fatcontents;Foodcontrol;Foodinspection;Foodproducts;Inter-laboratorytests;Investigations;Laboratorytests;Mathematicalcalculations;Methodsofanalysis;Randall
【摘要】:
【中国标准分类号】:B22
【国际标准分类号】:67_060
【页数】:24P;A4
【正文语种】:英语
基本信息
| 标准名称： | 医用治疗X线卫生防护规定 |
| 中标分类： |
医药、卫生、劳动保护 >>
医疗器械 >>
医用射线设备 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1993-08-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
没有内容
前言
没有内容
目录
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引用标准
没有内容
所属分类： 医药 卫生 劳动保护 医疗器械 医用射线设备
【英文标准名称】:StandardTestMethodforNondestructiveAssayofPlutonium,Tritiumand241AmbyCalorimetricAssay
【原文标准名称】:用量热分析进行钚、氚和241Am无损试验的标准试验方法
【标准号】:ASTMC1458-2009e1
【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】:C26.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Atmosphericanalysis;Calorimeter;Nondestructiveevaluation(NDE)--nuclearapplications;Plutonium;Tritium
【摘要】:ThistestmethodisthemostaccurateNDAtechniquefortheassayofmanyphysicalformsofPu.Isotopicmeasurementsbygamma-rayspectroscopyordestructiveanalysistechniquesarepartofthetestmethodwhenitisappliedtotheassayofPu.CalorimetryhasbeenappliedtoawidevarietyofPu-bearingsolidsincludingmetals,alloys,oxides,fluorides,mixedPu-Uoxides,mixedoxidefuelpins,waste,andscrap,forexample,ash,ashheels,salts,crucibles,andgraphitescarfings)(2,3).ThistestmethodhasbeenroutinelyusedatU.S.andEuropeanfacilitiesforPuprocessmeasurementsandnuclearmaterialaccountabilityforthelast40years(2-9).Pu-bearingmaterialshavebeenmeasuredincalorimetercontainersranginginsizefromabout0.025mtoabout0.60mindiameterandfromabout0.076mtoabout0.9minheight.Gamma-rayspectroscopytypicallyisusedtodeterminethePu-relativeisotopiccompositionand241AmtoPuratio(seeTestMethodC1030).Isotopicinformationfrommassspectrometryandalphacountingmeasurementsmaybeused(seeTestMethodC697).ThistestmethodisthemostaccurateNDAmethodforthemeasurementoftritium.Formanyphysicalformsoftritiumcompoundscalorimetryistheonlypracticalmeasurementtechniqueavailable.Physicalstandardsrepresentativeofthematerialsbeingassayedarenotrequiredforthetestmethod.Thistestmethodislargelyindependentoftheelementaldistributionofthenuclearmaterialsinthematrix.Theaccuracyofthemethodcanbedegradedformaterialswithinhomogeneousisotopiccomposition.Thethermalpowermeasurementistraceabletonationalmeasurementsystemsthroughelectricalstandardsusedtodirectlycalibratethecalorimetersortocalibratesecondary238Puheatstandards.Heat-flowcalorimetryhasbeenusedtopreparesecondarystandardsforneutronandgamma-rayassaysystems(7-12).CalorimetrymeasurementtimesaretypicallylongerthanotherNDAtechniques.Fourparametersoftheitemandtheitempackagingaffectmeasurementtime.Thesefourparametersaredensity,mass,thermalconductivity,andchangeintemperature.Themeasurementwellofpassivecalorimeterswillalsoaffectmeasurementtimebecauseittoowillneedtocometothenewequilibriumtemperature.Calorimetersoperatedinservomodemaintainaconstantmeasurementwelltemperatureandhavenoeffectonmeasurementtime.Calorimetermeasurementtimesrangefrom20minutes(13)forsmaller,temperature-conditioned,containersupto24hforlargercontainersanditemswithlongthermal-timeconstants.Measurementtimesmaybereducedbyusingequilibriumpredictiontechniques,bytemperaturepreconditioningoftheitemtobemeasured,oroperatingthecalorimeterusingtheservo-controltechnique.1.1Thistestmethoddescribesthenondestructiveassay(NDA)ofplutonium,tritium,and241Amusingheatflowcalorimetry.Forplutoniumthetypicalrangeofapplicabilitycorrespondsto~1gto~2000gquantitieswhilefortritiumthetypicalrangeextendsfrom~0.001gto~10g.Thistestmethodcanbeappliedtomaterialsinawiderangeofcontainersizesupto50L.Ithasbeenusedroutinelytoassayitemswhosethermalpowerrangesfrom0.001Wto135W.1.2Thistestmethodrequiresknowledgeoftherelativeabundancesoftheplutoniumisotopesandthe241Am/Pumassratiotodeterminethetotalplutoniummass.1.3Thistestmethodprovidesadirectmeasureoftritiumcontent.1.4Thistestmethodprovidesameasureof241Ameitherasasingleisotopeormixedwithplutonium.1.......
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:12P.;A4
【正文语种】:英语