Normal Pulse Voltammetry Purpose

Normal Pulse Voltammetry (NPV) is used for both quantitative chemical analysis and to study the mechanism, kinetics, and thermodynamics of chemical reactions.

NPV provides higher sensitivity than non-pulse methods such as Sampled DC Voltammetry. NPVmay be used with a solid electrode (Pt, Au, glassy carbon), a Hanging Mercury Drop Electrode, or a Dropping Mercury Electrode.

In NPV, the voltage is applied to the working electrode as a series of increasing pulses. The current is sampled electronically at the end of each pulse. This method of current measurement results in a smooth S-shaped voltammogram. In terms of sensitivity, NPV is excellent.

NPV may be performed on a stationary solid electrode, a rotated electrode, a hanging mercury drop electrode, a Static Mercury Drop Electrode, or a dropping mercury electrode. The NPV script in the Pulse Voltammetry software provides for mercury0drop generation, solution de-aeration, and experiment sequencing suitable for the most common applications for Normal DC Voltammetry.

The type of electrode is chosen using the Electrode Setup Panel.

Additional sequencing steps suitable for Normal Pulse anodic (or cathodic) Stripping are implemented in the software's NPS (Normal Pulse Stripping) technique.