ISO 2200-1972 工业用碳酸氢钠水含量的测定重量法
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【英文标准名称】:Sodiumhydrogencarbonateforindustrialuse;Determinationofmoisturecontent;Gravimetricmethod
【原文标准名称】:工业用碳酸氢钠水含量的测定重量法
【标准号】:ISO2200-1972
【标准状态】:作废
【国别】:国际
【发布日期】:1972-06
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:含水量;重量分析;化学制品;化学分析和试验;碳酸钠;水;化学分析;含量测定
【英文主题词】:determinationofcontent;water;sodiumcarbonate;chemicals;moisturecontents;chemicalanalysisandtesting;gravimetricanalysis
【摘要】:Themethodisapplicabletoproductshavingacontentgreaterthan0,1%(m/m).Theprincipleconsistsheatingthetestprotion,distributedinathinlayer,at250?Ctoconstantmass.Thewaterandofcarbondioxide,correspondingtothedecompositionofsodiumhydrogencarbonateintosodiumcarbonate.
【中国标准分类号】:G10
【国际标准分类号】:71_060_50
【页数】:1P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforSeparationandIdentificationofPoly(VinylChloride)(PVC)ContaminationinPoly(EthyleneTerephthalate)(PET)Flake
【原文标准名称】:聚乙烯对酞酰小片中聚氯乙烯杂质分离和鉴定的标准操作
【标准号】:ASTMD5991-2009
【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】:D20.95
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:contamination;poly(ethyleneterephthalate)(PET);poly(vinylchloride)(PVC);recycledplastics;Contamination--plastics;Identification;PET(poly(ethyleneterephthalate));Poly(vinylchloride)(PVC);Recycledplastics
【摘要】:PresenceofevenlowconcentrationsofPVCinrecycledPETflakesmayresultinequipmentcorrosionproblemsduringprocessing.ThelevelofPVCcontaminationmayalsodictatethemarketforuseoftherecycledpolymerinsecondaryproducts.Procedurespresentedinthispracticeareusedtoidentifyand,ifdesired,estimatetheconcentrationofPVCcontaminationinrecycledPETflakes.1.1Thispracticecoversfourproceduresforseparationandqualitativeidentificationofpoly(vinylchloride)(PVC)contaminationinpoly(ethyleneterephthalate)(PET)flakes.Note18212;Althoughnotpresentedasaquantitativemethod,procedurespresentedinthispracticemaybeusedtoprovidequantitativeresultsatthediscretionoftheuser.Theuserassumestheresponsibilitytoverifythereproducibilityofquantitativeresults.DatafromanindependentsourcesuggestaPVCdetectionlevelof200ppm(w/w)basedonanoriginalsampleweightof454g.1.2ProcedureAisbasedondifferentfluorescenceofPVCandPETwhenthesepolymersareexposedtoultraviolet(UV)light.1.3ProcedureBisanoventestbaseduponthecharringofPVCwhenitisheatedinairat235x00B0;C.1.4ProceduresCandDaredyetestsbasedondifferentialstainingofPVCandPET.Note28212;Otherpolymers(forexample,PETG)alsoabsorbthestainorbrightener.SuchinterferenceswillresultinfalsepositiveidentificationofPVCasthecontaminant.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecifichazardsseeSection8.Note38212;ThereisnoknownISOequivalenttothispractice.
【中国标准分类号】:G31
【国际标准分类号】:83_080_10
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:Radio-frequencyconnectors-Part8:R.F.coaxialconnectorswithinnerdiameterofouterconductor6,5mm(0,256in)withbayonetlock-Characteristicsimpedance50ohms(TypeBNC);Amendment2
【原文标准名称】:射频连接器第8部分:外导体内径为6.5mm(0.256in)的卡口锁紧射频同轴连接器特性阻抗50Ω(BNC型)修改2
【标准号】:IEC60169-8AMD2-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-11
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC46D
【标准类型】:()
【标准水平】:()
【中文主题词】:卡口灯头;内径;同轴连接器;电气工程;插接件连接;高频;电插头;射频连接;直径;电信;电连接器
【英文主题词】:Bayonetcaps;Coaxialconnectors;Connectoredjoints;Diameter;Electricconnectors;Electricplugs;Electricalengineering;Highfrequencies;Insidediameters;Radiofrequencyconnections;Telecommunication
【摘要】:
【中国标准分类号】:L23
【国际标准分类号】:33_120_30
【页数】:11P;A4
【正文语种】:英语
