What are the advantages of polarography?

The major advantages using polarography for inorganic analysis may be summarized: (1) comparatively inexpensive equipment is required, (2) ability of the technique to distinguish between elemental oxidation states (i.e., Cr, As), (3) ability of the technique to establish the chemical form of elements (e.g..

What is polarography in pharmaceutical analysis?

Polarography is considered to be an electroanalytical technique that is used for measuring the current flowing between two electrodes present in a solution. This technique is considered to be an electrochemical method that is responsible for analyzing solutions of reducible or oxidizable substances.

What are the types of polarography?

Normal polarography has been replaced by different types of pulse polarography (Fig. 6.28), e.g., differential pulse polarography, normal pulse polarography, staircase polarography, and square-wave polarography.

Who introduced polarography?

Jaroslav Heyrovský
It was invented by a Czech chemist, Jaroslav Heyrovský, in 1922. In general, polarography is a technique in which the electric potential (or voltage) is varied in a regular manner between two sets of electrodes (indicator and reference) while the current is monitored.

What is theory of polarography?

The simple principle of polarography is the study of solutions or of electrode processes by means of electrolysis with two electrodes, one polarizable and one unpolarizable, the former formed by mercury regularly dropping from a capillary tube.

What is the difference between polarography and voltammetry?

The key difference between polarography and voltammetry is that the polarography is a type of voltammetry that uses a liquid metal electrode whereas the voltammetry is an analytical technique in which the potential is varied regularly while the current is monitored.

Is polarography qualitative or quantitative?

Polarography technique is employed in organic chemistry for qualitative and quantitative analysis and structure determinations of organic compounds.

What is polarography method?

Introduction. Polarography is a voltammetric technique in which chemical species (ions or molecules) undergo oxidation (lose electrons) or reduction (gain electrons) at the surface of a dropping mercury electrode (DME) at an applied potential. Polarography only applies to the DME.

Who discovered polarography?

Polarography/Inventors
3.1 Polarography Polarography is an electroanalytical method based on the current–voltage measurement obtained using a dropping mercury electrode with a constant flow of mercury drops. Jaroslav Heyrovsky first introduced polarography in 1922.

Is used as Maxima suppressor in polarography?

Paracetamol produces good sigmoid anodic waves when solution of fuchsin, methyl red, thymol blue, bromocresol green are used as maxima suppressors at their optimum concentration and 0.1 M CH3COOH as supporting electrolyte.

What is the unique feature of polarography?

Polarography is probably the only dynamic (electrolytic) electroanalytical technique that can be conveniently and reliably applied for the determination of a wide spectrum of organic compounds.