Pulsed probe electrospray and nano-electrospray: the temporal profiles of ion formation from the Taylor cone

The temporal profiles of ion signals were measured for probe electrospray ionization (PESI) and nano-electrospray ionization (nESI) by changing the pulse width of the high voltage applied to the emitters (PESI: 0.12 mm o.d. and 700 nm tip diameter metal needle; nESI: metal-coated 15 μm i.d. silica c...

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Published in:Analytical methods 2017, Vol.9 (34), p.4958-4963
Main Authors: Usmanov, Dilshadbek T., Hiraoka, Kenzo, Ninomiya, Satoshi, Chen, Lee Chuin, Wada, Hiroshi, Matsumura, Masaya, Sanada-Morimura, Sachiyo, Nakata, Keisuke, Nonami, Hiroshi
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cited_by cdi_FETCH-LOGICAL-c334t-546774092008d821ced163a86bcb1f41ba7dd1e0c1612567436063a3b7e45c6e3
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container_issue 34
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container_title Analytical methods
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creator Usmanov, Dilshadbek T.
Hiraoka, Kenzo
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Nakata, Keisuke
Nonami, Hiroshi
description The temporal profiles of ion signals were measured for probe electrospray ionization (PESI) and nano-electrospray ionization (nESI) by changing the pulse width of the high voltage applied to the emitters (PESI: 0.12 mm o.d. and 700 nm tip diameter metal needle; nESI: metal-coated 15 μm i.d. silica capillary). The ion signals started to be detected at ∼400 μs and 5 ms, respectively, for PESI and nESI (solution: 10 −5 M cytochrome c and 0.1–1% acetic acid in H 2 O/MeOH (1/1)). With the addition of 10 mM ammonium acetate in 10 −5 M cytochrome c solution, the threshold for the signal appearance became about one order of magnitude longer with weaker signal intensities than those for acidic solutions. PESI was applied to real samples such as mayonnaise, natto (fermented soybeans), tomato ketchup and salmon eggs. Marked sequential electrospray was observed for these samples.
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title Pulsed probe electrospray and nano-electrospray: the temporal profiles of ion formation from the Taylor cone
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