What is the difference between Amperometry and Chronoamperometry?

Chronoamperometry is the technique in which the current is measured, at a fixed potential, at different times since the start of polarisation. On the other hand, voltammetry is a subclass of amperometry, in which the current is measured by varying the potential applied to the electrode.

What is meant by potentiometry?

Potentiometry is one of the methods of electroanalytical chemistry. It is usually employed to find the concentration of a solute in solution. In potentiometric measurements, the potential between two electrodes is measured using a high impedance voltmeter.

Which is applicable for Amperometry?

It is based on the principle of polarography , with the exception that the voltage is maintained constant during the titration. Potential applied between polarizable & non polarizable is kept constant. Capillary may blocked due to dust particles or it may break. Applicable only to +0.4 to -1.8v range.

What is the meaning of Chronoamperometry?

Chronoamperometry is an electrochemical technique in which the potential of the working electrode is stepped and the resulting current from faradaic processes occurring at the electrode (caused by the potential step) is monitored as a function of time.

What is the difference between Amperometry and polarography?

Amperometry monitors electric current (amperes) while keeping the potential constant. Polarography is a subtype of voltammetry that utilizes a liquid metal electrode. Coulometry is a method that monitors the quantity of electricity (coulombs) that are consumed during an electrochemical reaction involving the analyte.

How does Amperometry differ from colorimetric method of analysis?

A colorimetric chlorine monitoring system requires use of reagents and a buffer solution. Other options for pH compensation in amperometric systems use a pH measurement and compensation in the analyzer for changes in pH. Interferences for amperometric free chlorine measurement include ozone and chlorine dioxide.

What is the principle of Amperometry?

The principle of amperometric sensor is based on measuring current generated by enzymatic or bioaffinity reaction at the electrode surface, at a constant working potential with respect to the reference electrode.

What is potentiometry in clinical chemistry?

Potentiometry is a technique that is used in analytical chemistry, usually to find the concentration of a solute in solution. In this technique, the potential between two electrodes is measured using a high-impedance voltmeter (Wang, 2000).

What is not applicable for Amperometry?

Pt anode and Ag cathode does not exist and hence not used on amperometric biosensor.

What is the difference between Chronopotentiometry and chronoamperometry?

In chronoamperometry the current, while in chronocoulometry the charge is measured as a function of time after application of a potential step perturbation. In the case of chronopotentiometry, a current step is applied, and the change of the potential with time is detected.

What is faradaic and non faradaic process?

Both Faradaic and non-Faradaic processes can take place at an electrode. Thus, in a Faradaic process, after applying a constant current, the electrode charge, voltage and composition go to constant values. Instead, in a non-Faradaic (capacitive) process, charge is progressively stored.

Which is not applicable for Amperometry?