Transport of ions and charged droplets from the atmospheric region into a gas dynamic interface

Transport of charged particles from the region of their generation to vacuum through a transport capillary with various length-to-diameter ratios L / D = 0.8, 32.5 and 420 is studied. It is shown the process is affected mostly by the geometrical features of the transport capillary and the structure...

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Bibliographic Details
Published in:Journal of analytical chemistry (New York, N.Y.) N.Y.), 2013-12, Vol.68 (13), p.1151-1157
Main Authors: Fomina, N. S., Kretinina, A. V., Masyukevich, S. V., Bulovich, S. V., Lapushkin, M. N., Gall, L. N., Gall, N. R.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Capillarity
Chemical research
Chemistry
Chemistry and Materials Science
Ion transport
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Summary:Transport of charged particles from the region of their generation to vacuum through a transport capillary with various length-to-diameter ratios L / D = 0.8, 32.5 and 420 is studied. It is shown the process is affected mostly by the geometrical features of the transport capillary and the structure of particles, ions, or droplets, due to the method of their generation (ESI and APCI). A method for distinguishing ions and droplets inside a gas dynamic interface is utilized and supported by computational simulation. The droplets are shown to dominate in the current by ESI for all the capillaries studied. It is shown experimentally that space charge effects predominated over diffusion ones for all practically important currents and capillaries. The estimations show that electrostatic repulsion and their attraction to capillary walls because of the mirror charge induced by all particles are close in effect.
ISSN:1061-9348
1608-3199
DOI:10.1134/S1061934813130054