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@article{357876,
author = {Preisler, J. and Hu, P. and Rejtar, T. and Karger, B. L. and Hu, Ping and Rejtar, Tomáš},
article_location = {Washington, D.C., USA},
article_number = {20},
keywords = {MALDI; CE; interface; matrix-assisted laser desorption; vacuum; deposition; peptides; proteins; proteome; proteomic; digest},
language = {eng},
issn = {0003-2700},
journal = {Analytical Chemistry},
title = {Capillary electrophoresis - Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Using a vacuum deposition Interface},
volume = {72},
year = {2000}
}
TY - JOUR
ID - 357876
AU - Preisler, J. - Hu, P. - Rejtar, T. - Karger, B. L. - Hu, Ping - Rejtar, Tomáš
PY - 2000
TI - Capillary electrophoresis - Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Using a vacuum deposition Interface
JF - Analytical Chemistry
VL - 72
IS - 20
SP - 4785
EP - 4785
PB - American Chemical Society
SN - 00032700
KW - MALDI
KW - CE
KW - interface
KW - matrix-assisted laser desorption
KW - vacuum
KW - deposition
KW - peptides
KW - proteins
KW - proteome
KW - proteomic
KW - digest
N2 - An improved vacuum deposition interface for coupling capillary electrophoresis with MALDI/TOF MS has been developed. Liquid samples consisting of analyte and matrix were deposited on a moving tape in the evacuated source chamber of TOF mass spectrometer, enabling a day of continuous analysis without interruption. The vacuum deposition procedure was compared with the dried-droplet method, and it was found that vacuum deposition generated significantly more reproducible signal intensity, eliminating the need for the "sweet spot" searching. In addition, ion suppression caused by hydrophobicity differences in the analytes was reduced. In order to minimize ion suppression further, separation prior to MALDI/MS analysis was employed. The performance of capillary electrophoresis (CE) - MALDI/TOF MS using the vacuum deposition interface was evaluated with a peptide mixture injected at low femtomole levels. All peptides were baseline resolved with separation efficiencies in the range of 250,000 - 400,000 plates/m (2 - 3 second band halfwidth), demonstrating the high separation efficiency of the CE-MALDI/MS coupling.
ER -
PREISLER, J., P. HU, T. REJTAR and B. L. KARGER. Capillary electrophoresis - Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Using a vacuum deposition Interface. \textit{Analytical Chemistry}. Washington, D.C., USA: American Chemical Society, 2000, vol.~72, No~20, p.~4785-4795. ISSN~0003-2700.
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