Ion Enhancement and MS/MS for Analysis of Organics in Complex Mars Analog Matrices with the MOMA Ion Trap Mass Spectrometer

摘要

SelecDve ion trapping through the use of SWIFT during LDI ion introduction is effective for improving ion S/N within dense spectra. Reserving ion trap capacity for the m/z range of interest optimizes performance and science return. Higher pressures during ion trapping require higher amplitude SWIFT waveforms and result in reduced mass spectral resolution. LIT MS/MS functionality requires intelligent use of gas present during experiment. Mars atmosphere (primarily CO_2) from ion introduction can be used as the buffer gas for MS/MS operaDon. Selection of when MS/MS excitation occurs during the pump down curve is necessary to optimize performance. Future work will focus on developing algorithms for automating these methods during Mars surface operations.