SEMI C3.13-1000 STANDARD FOR NITROUS OXIDE (N2O) IN CYLINDERS

《SEMI C3.13-1000 STANDARD FOR NITROUS OXIDE (N2O) IN CYLINDERS》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、SEMIC3.13-1000STANDARDFORNITROUSOXIDE(N2O)INCYLINDERS,99.997%QUALITYThisstandardwastechnicallyapprovedbytheGlobalGasesCommitteeandisthedirectresponsibilityoftheNorthAmericanGasesCommittee.CurrenteditionapprovedbytheNorthAmericanRegionalStandardsCommitteeonAugust28,2000.In

2、itiallyavailableonSEMIOnLineSeptember2000;tobepublishedOctober2000.Originallypublishedin1982;previouslypublishedin1993.1Description4.1.1DetectionLimit—0.2ppm(mole/mole).1.1Nitrousoxideisanoxidizing,colorless,liquefied4.1.2Apparatusgaswithasweetishodor.Itisasimpleasphyxian

3、t.4.1.2.1PressureRegulator—OutletPressureRangeVaporpressureisabout745psigat70°F.0–30psig.2Specifications4.1.2.2Flowmeter—Range0–200mL/min.QUALITY:99.997%(SeeNotes1,2)4.1.2.3DetectorTube—Range2–30ppm.4.1.2.4Stopwatch.MaximumAcceptable4.1.2.56mm(1/4in)flexibletubing.Impurit

4、iesLevel(ppm)*Ammonia(NH3)54.1.3OperatingProcedureCarbonDioxide(CO2)24.1.3.1AttachasuitableregulatortothecylinderCarbonmonoxide(CO)1outlet.HydrocarbonsC1-C514.1.3.2ConnecttheflowmetertotheregulatorusingNitricOxide(NO)1flexibletubing.Nitrogen(N2)104.1.3.3Openthecylinderval

5、veandpurgetheNitrogendioxide(NO2)1flowmeterwithnitrousoxide.Oxygen(O2)2Water(H2O)(v/v)34.1.3.4Afterthelineisthoroughlypurged,stoptheflowofnitrousoxideandattachthedetectortubetotheTOTALSPECIFIEDIMPURITIES26outletoftheflowmeter.*Ananalysisofsignificantfigureshasnotbeenconsi

6、dered.Thenumberofsignificantfigureswillbebasedonanalyticalaccuracyand4.1.3.5Starttheflowofnitrousoxideandsettheflowtheprecisionoftheprovidedprocedure.rateto100mL/min.Thepressureandtemperatureofthesamplemustbewithinthetolerancesspecifiedby3PhysicalConstants(forinformationo

7、nly)themanufacturer.4.1.3.6Pass100mLofnitrousoxidethroughtheMetricUnitsUSUnitsdetectortube.Molecularweight44.0144.014.1.3.7DeterminetheconcentrationofammoniaBoilingpointat1atm-88.5°C-127.4°Faccordingtothedetectortubemanufacturer’s3Densityofgasat70°F1.947g/L0.1160lb/ftinst

8、ructions.Theconcentrationmaynotexceedthe(21.1°C)and1atmspecificationinSection2ofthisStandard.Spe