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Quadrupole Storage Mass Spectrometry.

Quadrupole ion tap use in recent years has undoubtedly created a new era in mass spectrometry. Ion traps using quadrupole electric fields are simplistic in design and relatively inexpensive to construct, yet they provide speed, accurate results and are readily used for a plethora of applications including [MS.sup.n] type experiments, single atom detection, atomic and molecular mass spectrometry; these devices also act as "laboratories" for gas phase ion chemistry and fundamental physical studies of stored ions. March and Hughes have done an outstanding job of presenting the history, theory, applications and some future uses for the versatile ion trap in their book Quadrupole Storage Mass Spectrometry.

Quadrupole Storage Mass Spectrometry is a well-structured book which is not only informative in the field but is also easily read and provides ample literature references on specific topics. When published, this was the most up-to-date compilation of its kind, and owing to its logical development and clear format, will remain a versatile source of information for quite some time.

The book begins with an in-depth historical section, written by J.F.J. Todd, one of the world's foremost scientists in the field of quadrupole ion trapping.

Chapter two develops the theory of quadrupole storage mass spectrometry by first using the familiar quadrupole mass filter and applying this knowledge to develop the operational theory of quadrupole ion traps. This chapter further expands upon such topics as ion motions, velocities, and kinetic energies from a theoretical standpoint. Furthermore, matrix methods and phase-space dynamics are introduced as a means of modelling the quadrupole ion trap.

The third chapter deals with the physical operation of quadrupole ion traps, including the various operational modes possible, ion trajectory studies in both two- and three-dimensional quadrupole electric fields, space charge effects within quadrupole ion traps, and a section on resonant excitation for stored ions with examples. Next, a relatively, comprehensive survey of ion chemistry studies is presented. which includes, proton affinity determinations, gas phase ion spectroscopy, photochemistry, and ion injection confinement experiments. Chapter five deals with cylindrical ion traps from a theoretical as well as experimental standpoint, as well as brief presentation of alterative electrode geometries for radio frequency quadrupole ion storage devices. The final chapters outline the salient features and some of the experimental attributes of two commercially available ion traps, the Finnigan MAT Ion Trap Detector (ITD) and Ion Trap Mass Spectrometer (ITMS) respectively.
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Author:Gill, Chris. G.
Publication:Canadian Chemical News
Article Type:Book Review
Date:May 1, 1992
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