Document Type
Article
Publication Date
2013
Journal or Book Title
Analytical Chemistry
Volume
85
Issue
12
First Page
6059
Last Page
6065
DOI
10.1021/ac400928p
Abstract
We present an experimental system that combines differential electrochemical mass spectrometry with hydrodynamic flow consisting of an impinging jet in a wall-tube configuration. This assembly allows simultaneous detection of electrochemical signals along with monitoring of dissolved gas species using differential electrochemical mass spectrometry under well-defined hydrodynamic conditions and over a wide range of mass transfer rates. The working electrode is deposited directly onto a thin, hydrophobic membrane, which also serves as the inlet to the mass spectrometer. This inlet provides extremely rapid mass detection as well as a high flux of products from the electrode surface into the mass spectrometer. The impinging jet is designed in a wall-tube configuration, in which the jet diameter is large compared to the electrode diameter, thus providing uniform and rapid mass transfer conditions over the entirety of the electrode surface. This combination of rapid detection and controllable flow conditions allows a wide range of hydrodynamic conditions to be accessed with simultaneous electrochemical and mass spectrometric detection of dissolved gas species, which is important in the analysis of a range of electrochemical reactions. The capabilities of this configuration are illustrated using a platinum-coated electrode and several electrochemical reactions, including ferrocyanide oxidation, proton reduction, and oxalic acid oxidation.
Copyright Owner
American Chemical Society
Copyright Date
2013
Language
en
File Format
application/pdf
Recommended Citation
Venkatachalam, Subramanian; Angelici, Robert J.; Woo, L. Keith; and Hillier, Andrew C., "High Rate Detection of Volatile Products Using Differential Electrochemical Mass Spectrometry: Combining an Electrode-Coated Membrane with Hydrodynamic Flow in a Wall-Tube Configuration" (2013). Chemical and Biological Engineering Publications. 132.
https://lib.dr.iastate.edu/cbe_pubs/132
Comments
This article is from Analytical Chemistry85 (2013): 6059-6065, doi:10.1021/ac400928p. Posted with permission.