【英文标准名称】:StandardTestMethodforTraceAmountsofPeroxidesInOrganicSolvents
【原文标准名称】:有机溶剂中过氧化物痕量的试验方法
【标准号】:ASTME299-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E15.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:assay;organic;peroxides;spectrophotometric;Activeoxygen;Organicchemicals;Peroxides;Solvents--paints/relatedcoatings/materials;Spectrophotometry--absorption;Traceelements--chemicals
【摘要】:Dilutesolutionsofperoxidesinvariousorganicsolventsfrequentlyareusedascatalystsorreactioninitiators.Peroxidesalsocanbeformedthroughautoxidationincertainclassesofcompoundsincludingethers,acetals,dienes,andalkylaromatichydrocarbonsandpresentapotentialsafetyhazard.Thistestmethodprovidesaprocedurefordeterminingtheperoxideoractiveoxygenlevel.1.1Thistestmethod,coversorganicsolventscontainingactiveoxygenintherangefrom5to80x03BC;g/g(ppm)orhigher.Byusingaspecialreaction-absorptioncell,thetestmethodcanbeextendedtocovertherangefrom0to5ppm.Thetestmethodcanbeusedtodeterminenumerousperoxideclassesofvaryingreactivitysuchashydroperoxides,diacylperoxides,diaroylperoxides,peresters,andketoneperoxides.Thestabledi-tert-alkylperoxidesdonotreactundertheconditionsofanalysis.1.2Solventsthatcanbeanalyzedsuccessfullyincludesaturatedandaromatichydrocarbons,alcohols,ethers,ketones,andesters.Inaddition,thetestmethodisapplicabletoolefinicsolventsandtocertaincompoundsthatcontainx03B1;,x03B2;,andconjugatedunsaturation.Solidsamplesthataresolubleintheaceticacid-chloroformsolventalsocanbeanalyzed.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidpractices,andsafetyprecautions.
【中国标准分类号】:G63
【国际标准分类号】:71_100_99
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:MobileandportableDVB-T/Hradioaccess-Part1:interfacespecification.
【原文标准名称】:移动和便携式DVB-T/H无线接口.第1部分:接口规范
【标准号】:NFC92-280-1-2007
【标准状态】:现行
【国别】:法国
【发布日期】:2007-01-01
【实施或试行日期】:2007-01-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:通路;天线;频带;数字视频广播;电磁兼容性;频率;频率范围;界面;干扰抑制;最低要求;移动无线电通信系统;乱真信号;工作模式;便携的;额定值;接收机;规范(验收);电视接收机;终端装置;试验;公差(测量);发射机;无线通信业务
【英文主题词】:
【摘要】:
【中国标准分类号】:M64
【国际标准分类号】:33_170
【页数】:56P;A4
【正文语种】:其他