Thermally Activated Electrostatic Injection of Solvated Ions by a Track Membrane Interfaced Vacuum Feedthrough

Vladimir V. Gridin, Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Electromembrane ion sources are considered as potential techniques for direct mass spectrometric sampling from ambient conditions. Interfacing of a time-of-flight mass spectrometer by means of a poly(ethylene terephthalate) track membrane requires investigation of the thermally activated processes involved. In this study, we directly attempt substantiating an activation-like performance of such track membrane-mediated interfaces. A number of KCl/glycerol solution samples were tested. A wide range of fixed, externally applied, potential drops was covered. For the charge extraction processes studied, we observe and discuss an activation term, exp(-ΔF/kBT), with a free-energy barrier ΔF = ΔF0 - ΔFΦ. The potential drop-dependent ΔFΦ, was found to be sensitive to the varying salt concentration.

Original languageEnglish
Pages (from-to)2213-2217
Number of pages5
JournalAnalytical Chemistry
Volume70
Issue number11
DOIs
StatePublished - 1 Jun 1998
Externally publishedYes

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