Why use a differential measurement in voltammetry?

Expert Solution

Votammetry is an Electro-analytical technique which is mailnly used to get information about an analyte,even current can be measured by varying voltage.

In voltammetry three types of electrodes are used working electrode,auxillary electrode,referance electrode.Referance electrode is a standard electrode in which potential is constant.Auxillary electrode is a thin platinum wire carrying current,in which redox reactions occur simultanously.

In Differential Pulse voltammetry the current is measured depending on two variable,first being time and other being potential.

ADVANTAGES OF APPLYING DIFFERENTIAL MEASUREMENT IN VOLTAMMETRY

Applying differential measurement makes voltammetry highly sensitive,so that data upto parts per billion can be calculated.
In stripping mode the measurements upto parts per trillion scales can be measured .
Differential measurement eleminates assymetrical waves better from background due to second deravative of the current s compared to other technique,in particular to normal pulse technique.

Nightingale answered 2 years ago

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