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Back Cover: Combination of large‐volume sample stacking with an electroosmotic flow pump with field‐amplified sample injection on cross‐channel chips
Author(s) -
Kitagawa Fumihiko,
Ishiguro Tatsuya,
Tateyama Misaki,
Nukatsuka Isoshi,
Sueyoshi Kenji,
Kawai Takayuki,
Otsuka Koji
Publication year - 2017
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201770123
Subject(s) - electrokinetic phenomena , stacking , analyte , microchannel , chemistry , analytical chemistry (journal) , sample (material) , chromatography , flow (mathematics) , channel (broadcasting) , materials science , mechanics , nanotechnology , physics , organic chemistry , engineering , electrical engineering
Electrophoresis 2017, 38 , 2075–2080. DOI: 10.1002/elps.201700155 The back cover picture shows a combination of large‐volume sample stacking with an electroosmotic flow pump (LVSEP) with field‐amplified sample injection (FASI) on a cross‐channel microchip with a large sample reservoir for highly sensitive analyses. By applying reversed‐polarity voltages on a cross‐channel chip, anionic analytes injected throughout a microchannel were first concentrated on the basis of LVSEP, followed by the electrokinetic stacking injection of the analytes from a sample reservoir by the FASI mechanism. Due to the dual preconcentration effects, amino acids were well enriched to give intense and sharp peaks with the preconcentration factors of 2400∼2970.