Cited by 165

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High Capacity Capillary Electrophoresis-Electrospray Ionization Mass Spectrometry: Coupling a Porous Sheathless Interface with Transient-Isotachophoresis

Busnel, Jean-Marc, Schoenmaker, Bart, Ramautar, Rawi, Carrasco-Pancorbo, Alegria, Ratnayake, Chitra, Feitelson, Jerald S., Chapman, Jeff D., Deelder, André M., Mayboroda, Oleg A.·2010·Analytical Chemistry

DOI 10.1021/ac102159d

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Abstract

A sheathless interface making use of a porous tip has been used for coupling capillary electrophoresis and electrospray ionization mass spectrometry. First, effective flow rates using the interface have been characterized. It was found that the interface is capable of generating a stable spray with flow rates ranging from below 10 nL/min to >340 nL/min, enabling its use in either the mass or concentration-sensitive region of the electrospray process. Subsequently, by analyzing peptide mixtures of increasing complexity, we have demonstrated that this platform provides exquisite sensitivity enabling the detection of very low amounts of materials with very high resolving power. Transient isotachophoresis (t-ITP) can also be integrated with this setup to increase the mass loading of the system while maintaining peak efficiency and resolution. Concentration limits of detection in the subnanomolar or nanomolar range can be achieved with or without t-ITP, respectively. The application of a vacuum at the inlet of the separation capillary further allowed the peak capacity of the system to be improved while also enhancing its efficiency. As a final step in this study, it was demonstrated that the intrinsic properties of the interface allows the use of coated noncharged surfaces so that very high peak capacities can be achieved.

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Authors: Busnel, J.-M., Schoenmaker, B., Ramautar, R., Carrasco-Pancorbo, A., Ratnayake, C., Feitelson, J. S., Chapman, J. D., Deelder, A. M., & Mayboroda, O. A.
Venue: Analytical Chemistry
Publisher: American Chemical Society (ACS)
Published: 2010-10-28
Volume: 82
Issue: 22
Pages: 9476-9483
ISSN: 0003-2700 (ISSN-L)
1520-6882
DOI: 10.1021/ac102159d
OpenAlex: W2329699243
Cited by: 165
References: 1
FWCI: 7.60
Type: journal article
Language: en
Open access: closed

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High Capacity Capillary Electrophoresis-Electrospray Ionization Mass Spectrometry: Coupling a Porous Sheathless Interface with Transient-Isotachophoresis

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