Musleh Uddin Munshi (Sogang University)

Musleh Uddin Munshi (Sogang University)

Musleh Uddin Munshi (Sogang University)

Han Bin Oh (Sogang University)

Musleh Uddin Munshi (Sogang University)

Musleh Uddin Munshi (Sogang University)

Han Bin Oh (Sogang University)

We aim to build a miniaturized digital rectilinear ion trap (DRIT) mass analyzer (10x10x40 mm³) (Fig 1). Incorporation of digital technology in ion trap (Paul type, linear quadrupole) MS is not new. Recently, this has got the most attention due to the advancement of digitization. We have already designed and manufactured the RIT based on the existing design of Ouyang et al. (Anal. Chem. 2004). These RITs have much simpler geometries than hyperbolic Paul traps, including high trapping capabilities. A crucial advantage is the use of digital rectangular waveforms on the electrodes instead of classical rf-Sine waves. Additionally, the mass scan is achieved by scanning the frequency while holding the voltage constant, not the opposite. Manipulation of the duty cycle of the trapping waveform and the excitation waveform allows to carry out mass (m/z) isolation and CID MS, respectively, without additional circuitry. In this contribution, we show simulation results of ion motions inside RIT employing commercially available software SIMION/SIMAX. Together with electrospray ionization (ESI) source, physical RIT assembly is tested using classical analog operation where boundary ejection method is chosen successfully to generate the first mass spectra (Fig 1).  

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