alexa Twenty years of interface development for capillary electrophoresis-electrospray ionization-mass spectrometry.
Medicine

Medicine

Advanced Techniques in Biology & Medicine

Author(s): Maxwell EJ, Chen DD, Maxwell EJ, Chen DD

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Abstract Capillary electrophoresis-electrospray ionization-mass spectrometry has the potential to become a preferred tool for the analysis of biological mixtures and other complex samples. The development of improved interfaces in the past twenty years has been critical in demonstrating the feasibility of this technique. However, a compromise still exists between interfaces that give optimal performance and those that are practical for commercial applications. The first section of this review focuses on the technological advances in CE-ESI-MS as they relate to the key interface features for both sheath-flow and sheathless systems: delivery of the sheath liquid, shaping of the emitter tip, formation of electrical contact, and practicality in terms of ease of use and lifetime. In the second section, we review the fundamental processes that affect interface performance. Because of the complex natures of both capillary electrophoresis and electrospray ionization, flow rate, arrangement of the electrical circuit, electrochemistry, tip geometry and location of electrical contact must all be carefully managed in the design of a successful interface. This article was published in Anal Chim Acta and referenced in Advanced Techniques in Biology & Medicine

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