Accession Number : ADA193750

Title :   Instrumental Configurations and Electrode Design for Voltammetry in very Dilute Solutions Employing Carbon, Gold and Platinum Microdisk Electrodes in Static and Flow through Cells.

Descriptive Note : Technical rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF CHEMISTRY

Personal Author(s) : Pons, Stanley ; Bixler, J W ; Bond, A M ; Lay, P A ; Thorman, W

PDF Url : ADA193750

Report Date : 30 Jul 1986

Pagination or Media Count : 32

Abstract : Microelectrodes are predicted to provide greater analytical sensitivity than conventional-size electrodes. In this work, convenient methods of preparing platinum, gold and carbon fibre microdisk electrodes in stationary and flowing solution configurations are presented and instrumental requirements for measurement of current-voltage curves with low concentrations assessed. The detection of micromolar or lower concentrations with microdisk electrodes requires measurement of femtoamp currents and is outside the range of most commercially available instrumentation. Fortunately, the ohmic (iR) drop with microelectrodes is very small and reference electrode polarization is unimportant so that a two electrode format without a potentiostat can be employed.

Descriptors :   *ELECTRODES, *MEASUREMENT, *VOLTAMMETRY, CARBON, CARBON FIBERS, CONFIGURATIONS, CURVES(GEOMETRY), DETECTION, DILUTION, ELECTRIC CURRENT, FORMATS, PLATINUM, SENSITIVITY, SOLUTIONS(GENERAL), STATIONARY, VOLTAGE

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE