Abstract
A digital AC voltammetric technique in which the perturbation signal is obtained from a computer-controlled analog function generator is described. This approach overcomes the limitation of the upper frequency inherent in computer generated sinusoidal signals. The measurement of the current at a constant phase angle of the input sine wave is facilitated by synchronizing the current digitization with the triggering of the function generator. The frequency of the sine wave is controlled by the computer, through the voltage-controlled-oscillator of the function generator. A program based on the Fast Fourier Transform (FFT) algorithm is used to extract the frequency information from the total cell current and to discriminate against charging current. All the components used in the instrumental design are commercially available.
| Original language | English |
|---|---|
| Pages (from-to) | 1-22 |
| Number of pages | 22 |
| Journal | Instrumentation Science and Technology |
| Volume | 20 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 1992 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was in part supported by the National Science Foundation (CHE-85-07901) and the Office of Army Research (DAALO3-86-K-OO4O). The assistance of Glenn Hennessee in computer programming as well as having many a useful discussion is gratefully acknowledged. Also we are thankful to Richard Beck for his help in computer interfacing.
ASJC Scopus subject areas
- General Chemical Engineering
- Instrumentation
- General Environmental Science