IRMS培训

Training-IRMSBasics:Training-IRMSBasicsHCNOSElementZ=()N=A=N+Z=N+ZZ“”:,,,,Training-IRMSBasics•[%]Hydrogen2H(D)0.01557Carbon13C1.11140Nitrogen15N0.36630Oxygen18O0.20004Sulfur34S4.21500Training-IRMSBasics•δ•:–,–[]()()()()()1000*11000*‰Reference−=−=RRRRRδIRMSTraining-IRMSBasics45004.5±9.3CDT(Canyon-Diabolo-Triolit)Sulfur34S/32S2005.2±0.43SMOWOxygen18O/16O3676.5±8.1AirNitrogenNitrogen15N/14N11237.2±2.9PDB(PeeDeeBelemnite)Carbon13C/12C155.76±0.10SMOW(StandardMeanOceanWater)Hydrogen2H/1H,RAcceptedvaluex106Training-IRMSBasicsCO2,N2,SO2-–/CO2,N2,N2O,H2,O2,COIRMS13C,15N,34S,18O,DCO,H2Training-IRMSBasicsIRMSGasbenchUniversal3Universal6MEMCO6H/DCollectorDualInletH/DCollectorContinuousFlowGC/C/TCTraceGC/AgilentGCConFloEA/TC/EAGC/GPPreConIonSourceAnalyzerDetectorContinousFlowSystemsMassSpectrometerTraining-IRMSBasics•••Training-IRMSBasics•VacuumRanges–RoughVacuum:1000–1mbar–MediumVacuum:1–10-3mbar–HighVacuum:10-3–10-8mbar–UltraHighVacuum:Lessthan10-8mbarTraining-IRMSBasicsForeVacuumPump•Pfeifer“Duo5”forthesource•Pfeifer“Duo2.5”fortheanalyzer•Pfeifer“Duo“2.5”fortheinletsystemDuo5Duo2.5Training-IRMSBasicsTraining-IRMSBasicsMoleculardragrotorsHighvacuumconnectionRotordiskStatordiskMoleculardragstatorsForevacuumconnectionTraining-IRMSBasics•::–:A+e-An++(n+1)e-–:AB+e-AB++e-–:A++B+e-Training-IRMSBasicsTraining-IRMSBasicsDeltaPlusAdvantage/XP:PotentialsoftheIonSourceTraining-IRMSBasicsBasicEquation(1):HowFastisanIon?(2)EKin=½m*v2(1):EPot=q*U(4):e*U=½m*v2EKin=EPot(5):2*e*Umv=√¾.U:(3)q=e=1.6*10-19AsTraining-IRMSBasicsTraining-IRMSBasicsm/z2(H2)m/z3(HD)•m/z44,45,46(CO2)•m/z28,29,30(N2,CO)•m/z32,33,34(O2)•m/z64,66(SO2)CNOSH(DeltaPlusXL/XP)Training-IRMSBasics(1):F=q*v*B(2)():FZ=m*v2rFvBFZ=m*v2r=q*v*B(1)=(2)r=m*vq*B(3)Training-IRMSBasics:E0199023PO•Training-IRMSBasicsDeltaPlusXL/XP:Training-IRMSBasicsSecondaryElectronSupression-250VResolvingSlitGroundRecapturedElectronTraining-IRMSBasics2H/1H:•:–m/z=1•H+–m/z=2•H2+•D+•He2+–m/z=3•HD+•H3+–m/z=4•D2+•He+0,0152H99,9851H[%]Training-IRMSBasicsuniversaltriplecollectorForN2,CO2,CO,SO2,O24He+HD+107DeltaPlusXL/XPIonOptics:2H/1HAnalysism/z2(H2+)3KVm/z3(HD+)3KVm/z4(He+)2.25-2.5KVTraining-IRMSBasicsm/z=3SESupression-250V2.55KVTraining-IRMSBasicsm/z3(HD)m/z2(H2)4Hem/z3[HVDAC]012345678910Intensity[V]2800260024002200200018001600m/z3(HD)m/z2(H2)Contributionfrom4HewithoutsuppressionTraining-IRMSBasicsH3+FactorH3+productionbyionmoleculereaction:H2++H2H3++H0.150.200.250.300.350.400.450.500.55012345678910mass2(V)()HD+H3+H2•H3+factor:•H3+?Training-IRMSBasics•Thankyou