Capillary-Based Multi Nanoelectrospray Emitters: Improvements in Ion Transmission Efficiency and Implementation with Capillary Reversed-Phase LC-ESI-MS
- 29 November 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 80 (1), 143-149
- https://doi.org/10.1021/ac701647s
Abstract
We describe the coupling of liquid chromatography (LC) separations with mass spectrometry (MS) using nanoelectrospray ionization (nano-ESI) multiemitters. The array of 19 emitters reduced the flow rate delivered to each emitter, allowing the enhanced sensitivity that is characteristic of nano-ESI to be extended to higher flow rate separations. The signal for tryptic fragments from proteins spiked into a human plasma sample increased 11-fold on average when the multiemitters were employed, due to increased ionization efficiency and improved ion transfer efficiency through a newly designed heated multicapillary MS inlet. Additionally, the LC peak signal-to-noise ratio increased ∼7-fold when the multiemitter configuration was used. The low dead volume of the emitter arrays preserved peak shape and resolution for robust capillary LC separations using total flow rates of 2 μL/min.Keywords
This publication has 41 references indexed in Scilit:
- Electrospray Characteristic Curves: In Pursuit of Improved Performance in the Nanoflow RegimeAnalytical Chemistry, 2007
- Microfabricated Monolithic Multinozzle Emitters for Nanoelectrospray Mass SpectrometryAnalytical Chemistry, 2007
- Evaluation of Multiprotein Immunoaffinity Subtraction for Plasma Proteomics and Candidate Biomarker Discovery Using Mass SpectrometryMolecular & Cellular Proteomics, 2006
- Chemically Etched Open Tubular and Monolithic Emitters for Nanoelectrospray Ionization Mass SpectrometryAnalytical Chemistry, 2006
- An evaluation of the performance of porous polymer monolith assisted electrosprayRapid Communications in Mass Spectrometry, 2005
- Research Profiles: A discriminating assay for endocrine disruptersAnalytical Chemistry, 2004
- Incorporation of a Venturi Device in Electrospray IonizationAnalytical Chemistry, 2003
- Improved Ion Transmission from Atmospheric Pressure to High Vacuum Using a Multicapillary Inlet and Electrodynamic Ion Funnel InterfaceAnalytical Chemistry, 2000
- Analytical Properties of the Nanoelectrospray Ion SourceAnalytical Chemistry, 1996
- Scale-up of electrospray atomization using linear arrays of Taylor conesReview of Scientific Instruments, 1993