What is application of polarography?
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What is application of polarography?
Polarography has been used extensively to determine trace metals in pharmaceutical products and to estimate drugs that contain metals as a constituent. The metals examined include antimony, arsenic, cadmium, copper, iron, lead, magnesium, mercury, vanadium and zinc.
What is polarographic technique?
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.
In which voltage range DME can be applied in polarography?
Use the potential range of –0.1 to 1.0 V ( , tp = 20 ms, pulse amplitude = 20 mV, scan rate = 10 mV/s).
What is polarographic measurement?
Polarography is a specific type of measurement that falls into the general category of linear-sweep voltammetry where the electrode potential is altered in a linear fashion from the initial potential to the final potential.
What is the principle of polarographic titration?
Principle: Polarography is based upon the principle that gradually increasing voltage is applied between two electrodes, one of which is polarisable (dropping mercury electrode) and other is non-polarisable and current flowing between the two electrodes is recorded.
Which statement is true about polarography?
Which statement is true about polarography? Ans: (d) The magnitude of the diffusion current is proportional to concentration of electroactive species Q.
Which of the following electrode is used in polarography?
dropping-mercury electrode
In polarography, the working electrode is a dropping-mercury electrode (DME).
Which of the following gas is passed in the polarography instrument?
Explanation: Polarographic cells used for measuring the partial pressure of oxygen are temperature-sensitive.
Which of the following gas is not sensed by polarographic cells?
carbon monoxide
It is suitable for measuring traces of H2O. 7. Polarographic cells are not sensitive to which of the following gases? Explanation: Polarographic cells are not sensitive to carbon monoxide.
