Frank Gunzer
ABSTRACT
High precision instruments are a requirement in a lot of scientific disciplines. Environmental research is no difference in this regard. Often, it is necessary to know which substances are present in gaseous form, e.g. for exhaust gas analysis, or contamination management. Mass spectrometry is a technique that yields the molecular mass of analytes present in the device. If the resolving power is too low, the molecular mass is not sufficient to identify a substance. Other techniques have then to be used in order to obtain further information. However, if the mass resolving power is high enough, it can lower the number of candidates that might be present in a sample based on the molecular mass alone. Ion traps are devices that can be used as mass analyzers with very high resolving power. A relatively new representative of ion traps for mass analysis is the Cassinian ion trap. Although offering already very high mass resolving power, it can be further increased by changing the geometric and electric parameters. Ion traps work by letting ions fly on a closed trajectory for very long times (up to a few seconds). Changing geometric or electric parameters can possibly change the trajectories so that the ions do not fly for long times, but collide with the housing or electrodes instead. In this paper, we have analyzed how the geometry and electrode voltage influence the stability of ion trajectories when the ions are injected via a small tunnel from the outside. For this, the known differential equations describing the ion trajectories have been solved numerically. This knowledge can then be used to design Cassinian Traps with increased resolving power.
- Lebedev, A.T. 2013. Environmental Mass Spectrometry. Ann. Rev. Anal. Chem. 6, 163--189. DOI: 10.1146/annurev-anchem-062012-092604Google Scholar
Cross Ref
- Nolting, D., Malek, R., and Makarov, A. 2017. Ion traps in modern mass spectrometry. Mass Spectrom. Rev., in print. DOI: 10.1002/mas.21549Google Scholar
- Govaerts, C., Adams, E., Van Schepdael, A, and Hoogmartens, J. 2003. Hyphenation of liquid chromatography to ion trap mass spectrometry to identify minor components in polypeptide antibiotics. Anal. Bioanal. Chem. 377, 909--921. DOI: 10.1007/s00216-003-2173-xGoogle ScholarCross Ref
- Chen, X.F., Wu, H.T., Tan, G.G., Zu, Z.Y., and Chai, Y.F. 2011. Liquid chromatography coupled with time-of-flight and ion trap mass spectrometry for qualitative analysis of herbal medicines. J. Pharm. Anal. 1, 235--245. DOI: 10.1016/j.jpha.2011.09.008Google ScholarCross Ref
- Zubarev, R.A. and Alexander Makarov, A. 2013. Orbitrap Mass Spectrometry. Anal. Chem. 85, 5288--5296. DOI: 10.1021/ac4001223Google ScholarCross Ref
- Donohoe, G.C., Maleki, H., Arndt, J.R., Khakinejad, M., Yi, J., McBride, C., Nurkiewicz, T.R., and Valentine, S.J. 2014. A New Ion Mobility-Linear Ion Trap Instrument for Complex Mixture Analysis. Anal. Chem. 86, 8121--8128. DOI: 10.1021/ac501527yGoogle ScholarCross Ref
- Kharchenko, A., Vladimirov, G, Heeren, R.M., and Nikolaev, E.N. 2012. Performance of Orbitrap mass analyzer at various space charge and non-ideal field conditions: Simulation approach. J. Am. Soc. Mass Spectrom. 23, 977--987. DOI: 10.1007/s13361-011-0325-3Google ScholarCross Ref
- Makarov, A., Denisov, E., Lange, O. 2009. Performance Evaluation of a High-field Orbitrap Mass Analyzer. J. Am. Soc. Mass Spectrom. 20, 1391--1396. DOI: 10.1016/j.jasms.2009.01.005Google ScholarCross Ref
- Koester, C. 2015. Twin trap or hyphenation of a 3D Paul-and a Cassinian ion trap. J. Am. Soc. Mass Spectrom. 26, 390--396. DOI: 10.1007/s13361-014-1050-5Google ScholarCross Ref
- Koester, C. 2009. The concept of electrostatic non-orbital harmonic ion trapping. Int. J. Mass Spectrom. 287, 114--118. DOI: 10.1016/j.ijms.2009.01.014Google ScholarCross Ref
- Raupers, B., Medhat, H., Gunzer, F., Grotemeyer, J. 2019. Influence of the trap length on the performance of Cassinian ion traps: A simulation study. Int. J. Mass Spectrom. 438, 55--62. DOI: 10.1016/j.ijms.2018.12.017Google ScholarCross Ref
Index Terms
- Analysis of Ion Trajectory Stability in Second Order Cassinian Ion Traps
Recommendations
Thermal stability of tantalum nitride diffusion barriers for Cu metallization formed using plasma immersion ion implantation
Plasma immersion ion implantation (PIII) technique was employed to form Tantalum nitride diffusion barrier films for copper metallization on silicon. Tantalum coated silicon wafers were implanted with nitrogen at two different doses. A copper layer was ...
Enhancement of electrochemical stability about silicon/carbon composite anode materials for lithium ion batteries
Special issue on Advanced Nanomaterials for Energy-Related ApplicationsSilicon/carbon (Si/C) composite anode materials are successfully synthesized by mechanical ball milling followed by pyrolysis method. The structure and morphology of the composite are characterized by X-ray diffraction and scanning electron microscopy ...
Comments