【英文标准名称】:StandardTestMethodsforLeaksUsingtheMassSpectrometerLeakDetectororResidualGasAnalyzerintheTracerProbeMode
【原文标准名称】:在示踪探针法中用质谱仪检漏器或残余气体分析器作泄漏检验的测试方法
【标准号】:ASTME498-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:E07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;检漏器;不渗透性;泄漏;无损检验;示踪法;质谱仪;残余气体
【英文主题词】:belljarleaktest;bombmassspectrometerleaktest;heliumleadtesting;heliumleaktest;leaktesting;massspectrometerleaktesting;sealedobjectmassspectrometerleaktest
【摘要】:TestMethodAisthemostfrequentlyusedinleaktestingcomponentswhicharestructurallycapableofbeingevacuatedtopressuresof0.1Pa(approximately10x2212;3torr).Testingofsmallcomponentscanbecorrelatedtocalibratedleaks,andtheactualleakratecanbemeasuredoracceptancecanbebasedonamaximumallowableleak.Formostproductionneedsacceptanceisbasedonacceptanceofpartsleakinglessthananestablishedstandardwhichwillensuresafeperformanceovertheprojectedlifeofthecomponent.Caremustbeexercisedtoensurethatlargesystemsarecalibratedwithreferenceleakatarepresentativeplaceonthetestvolume.Leakratesaredeterminedbycalculatingthenetgainorlossthroughaleakinthetestpartthatwouldcausefailureduringtheexpectedlifeofthedevice.TestMethodBisusedfortestingvacuumsystemseitherasastepinthefinaltestofanewsystemorasamaintenancepracticeonequipmentusedformanufacturing,environmentaltestorforconditioningparts.Asthevolumetendstobelarge,acheckoftheresponsetimeaswellassystemsensitivityshouldbemade.VolumeofthesysteminlitersdividedbythespeedofthevacuumpumpinL/swillgivetheresponsetimetoreach63%ofthetotalsignal.Responsetimesinexcessofafewsecondsmakesleakdetectiondifficult.TestMethodCistobeusedonlywhenthereisnoconvenientmethodofconnectingtheleakdetectortotheoutletofthehighvacuumpump.Ifaheliumleakdetectorisusedandthehighvacuumpumpisanionpumporcryopump,leaktestingisbestaccomplishedduringtheroughingcycleasthesepumpsleavearelativelyhighpercentageofheliuminthehighvacuumchamber.Thiswillobscureallbutlargeleaks,andthetracegaswillquicklysaturatethepumps.1.1Thesetestmethodscoverproceduresfortestingandlocatingthesourcesofgasleakingattherateof4.51014mol/s(1109Stdcm3/s)orgreater.Thetestmaybeconductedonanyobjecttobetestedthatcanbeevacuatedandtotheothersideofwhichheliumorothertracergasmaybeapplied.1.2Threetestmethodsaredescribed:1.2.1TestMethodA-Fortheobjectundertestcapableofbeingevacuated,buthavingnoinherentpumpingcapability.1.2.2TestMethodB-Fortheobjectundertestwithintegralpumpingcapability.1.2.3TestMethodC-FortheobjectundertestasinTestMethodB,inwhichthevacuumpumpsoftheobjectundertestreplacethosenormallyusedintheleakdetector.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Aspecifichazardstatementcanbefoundin.
【中国标准分类号】:H26
【国际标准分类号】:19_100
【页数】:4P.;A4
【正文语种】:
基本信息
标准名称: | 出口肉品中青霉素残留量检验方法杯碟法 |
英文名称: | Method for the determination of penicillin residues in meat for export—Cylinder plate method |
中标分类: |
农业、林业 >>
畜牧 >>
畜牧综合 |
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: | 1996-04-29 |
实施日期: | 1996-10-01 |
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: | 中华人民共和国四川进出口商品检验局 |
起草人: | 石如彦、曹宗君、沈洪刚、孟萍生、胡晓琼、程玲玲 |
出版日期: | 1996-10-01 |
页数: | 14页 |
适用范围
本标准规定了出口肉品中青霉素残留量检验的抽样、制样和杯碟测定法。
本标准适用于出口猪、牛、鸡肉中青霉素残留量的检验。
前言
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引用标准
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所属分类: 农业 林业 畜牧 畜牧综合