基本信息
| 标准名称： | 出口水产品中铯放射性活度检验方法γ射线能谱法 |
| 英文名称： | Method for the determination of radioactivity of cesium-137 in aquatic products for export—Gamma-ray spectroscopic method |
| 中标分类： |
农业、林业 >>
水产、渔业 >>
水产、渔业综合 |
| 发布部门： | 中华人民共和国国家进出口商品检验局 |
| 发布日期： | 1997-08-15 |
| 实施日期： | 1998-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 主管部门： | 中华人民共和国国家进出口商品检验局 |
| 提出单位： | 中华人民共和国国家进出口商品检验局 |
| 归口单位： | 中华人民共和国国家进出口商品检验局 |
| 起草单位： | 中华人民共和国山东进出口商品检验局 |
| 起草人： | 孙勇、李泽瑶、张勤、程秀杰 |
| 出版日期： | 1998-01-01 |
| 页数： | 11页 |
适用范围
本标准规定了出口水产品中艳-137放射性活度检验的抽样、制样和Y射线能谱测定方法。
本标准适用于出口鱼、虾、贝中艳-137放射性活度的检验。
前言
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目录
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引用标准
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所属分类： 农业 林业 水产 渔业 水产 渔业综合
【英文标准名称】:StandardPracticeforAcceleratedAgingofUltra-HighMolecularWeightPolyethyleneafterGammaIrradiationinAir
【原文标准名称】:空气中a－射线辐射后的超高分子重量聚乙烯加速老化的标准方法
【标准号】:ASTMF2003-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:F04.15
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:aging;oxidation;preconditioning;stability;UHMWPE;UHMWPE;ultra-highmolecularweightpolyethylene;Acceleratedaging/testing--surgicaldevices/applications;Polyethylene(PE)surgicalimplantapplications;Preconditioning;UHMWPE(ultra-highmolecul
【摘要】:ThispracticesummarizesamethodthatmaybeusedtoacceleratetheoxidationofUHMWPEcomponentsusingelevatedtemperatureandelevatedoxygenpressure.Underreal-timeconditions,suchasshelfagingandimplantation,oxidativechangestoUHMWPEaftersterilizationusinghighenergyradiationmaytakemonthsoryearstoproducechangesthatmayresultindeleteriousmechanicalperformance.Themethodoutlinedinthispracticepermitstheevaluationofoxidativestabilityinarelativelyshortperiodoftime(forexample,weeks).ThispracticemayalsobeusedtooxidizeUHMWPEtestspecimensandjointreplacementcomponentspriortocharacterizationoftheirphysical,chemical,andmechanicalproperties.Inparticular,thispracticemaybeusedforacceleratedagingofUHMWPEcomponentspriortoevaluationinahiporkneejointwearsimulatorasoutlinedinGuideF1714(hipwear),GuideF1715(kneewear),ISO14242(hipwear),orISO14243(kneewear),orcombinationthereof.1.1ItistheintentofthispracticetopermitaninvestigatortoevaluatetheoxidativestabilityofUHMWPEmaterialsasafunctionofprocessingandsterilizationmethod.Thispracticedescribesalaboratoryprocedureforacceleratedagingofultra-highmolecularweightpolyethylene(UHMWPE)specimensandcomponentsfortotaljointprostheses.TheUHMWPEisagedatelevatedtemperatureandatelevatedoxygenpressure,toaccelerateoxidationofthematerialandtherebyallowfortheevaluationofitslong-termchemicalandmechanicalstability.1.2Althoughtheaccelerated-agingmethoddescribedbythispracticewillpermitaninvestigatortocomparetheoxidativestabilityofdifferentUHMWPEmaterials,itisrecognizedthatthismethodmaynotpreciselysimulatethedegradativemechanismsforanimplantduringreal-timeshelfagingandimplantation.1.3Theacceleratedagingmethodspecifiedhereinhasbeenvalidatedbasedonoxidationlevelsexhibitedbycertainshelf-agedUHMWPEcomponentspackagedinairandsterilizedwithgammaradiation.ThemethodhasnotbeenshowntoberepresentativeofshelfagingwhentheUHMWPEispackagedinanenvironmentotherthanair.Forexample,thispracticehasnotbeendirectlycorrelatedwiththeshelflifeofcomponentsthathavebeensealedinalow-oxygenpackage,suchasnitrogen.ThispracticeisnotintendedtosimulateanychangethatmayoccurinUHMWPEfollowingimplantation.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:4P.;A4
【正文语种】:英语