While using contant potential with time for the electrochemical deposition, how we can calculate the amount of deposited material.
96500 coulomb current will deposit 1 gm equivalent. You can check the reference: Int. J. Electrochem. Sci., 9 (2014) 1003 - 1015.
My concern is the calculation of equivalent weight. Current i multiplied by time t is coulomb.
So pass a known current for a known time and measure the weight change of the electrode. The change in weight will be the deposition of PANI. Then back calculate the equivalent weight and use it in your calculation based on Faraday's second law of electrolysis.
First apply ohms law and get the value of current by knowing the resistance connected in your instrument. Then compute charge in coulombs.. The equivalent weight of PANI you can get from literature.So apply Faraday's law with proper units of current potential and time.
Faraday's law is used... only if you consider 100% Yield of electropolymerization : (i) each electron passed serving to only oxidize the monomer and to dope the polymer; (ii) all electrogenerated material (PANI) is attached on the electrode (no oligomers waste in solution).
So let's say that usually Faraday's law is a good way to estimate the weight.
For very small weights say nanograms quartz crystal micro balance can be tried.
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