The video describes an experiment using square wave voltammetry to analyze ferrocyanide, focusing on how frequency settings impact the signal. A 5 mM ferrocyanide solution is analyzed, and different frequencies are tested (5 Hz, 25 Hz, 50 Hz, 100 Hz, and 200 Hz). Data is recorded and uploaded to a system called Julie for analysis and comparison.
Key observations:
- At lower frequencies (e.g., 5 Hz), the signal takes longer to record and is less defined, making it less practical.
- At very high frequencies (e.g., 200 Hz), the signal becomes distorted due to the rapid changes in potential.
- 25 Hz produces a clear peak with minimal noise, making it an optimal frequency for accurate and efficient analysis.
- 50 Hz and 100 Hz signals are still usable, but the quality begins to degrade at higher speeds.
This experiment highlights the balance between speed and signal clarity when optimizing SWV parameters, particularly the frequency.
