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

Abstract

The temporal profiles of the ion signals were measured for probe electrospray ionization (PESI) and nano-electrospray ionization (nESI) by changing the pulse width of high voltage applied to the emitters (PESI: 0.12mm o.d. and 700 nm tip diameter metal needle; nESI: metal coated 15 um 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 H2O/MeOH(1/1)). With the addition of 10 mM ammonium acetate in 10−5 M cytochrome c solution, threshold for the signal appearance became about one order of magnitude longer with much weaker signal intensities than those for acidic solutions. PESI was applied to real samples such as mayonnaise, natto (fermented soybeans), tomato ketchup and salmon egg. Marked sequential electrospray was observed for these samples.

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Publication details

The article was accepted on 07 Jun 2017 and first published on 08 Jun 2017


Article type: Paper
DOI: 10.1039/C7AY01275F
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Pulsed probe electrospray and nano-electrospray: the temporal profiles of ion formation from the Taylor cone

    D. T. Usmanov, K. Hiraoka, S. Ninomiya, L. C. Chen, H. Wada, M. Matsumura, S. Sanada-Morimura, K. Nakata and H. Nonami, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01275F

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