Dear Researchers,
In CV analysis we will get REDOX curve , from this we can get Area, that means current (I) value. Actually, my doubt is in this case, using CV instrument (SP 300 biologic Instrument) software, I will get some value of area And using origin software I am getting some different value of area both are not in same values for same data points, I don;t know why it is? and Kindly give your valuable suggestions and answers.
For Example;
using CV instrument (SP 300 biologic Instrument) software = 0.5555mA
using origin software = 1.15125 mA
if you are taking the 'readings' from the instrument read out, you can take the area given by the instrument itself. Otherwise take the other one.
This area can't be a current (I) value. Both values may be wrong.
An integration that makes sense may be:
Charge/area = Current density(t) x dt.
Cornel Radu is right.
If the biologic instrument also provides the time (measurement time, starting from 0 at the beginning of the measurement), plot the current over time and get the area below this curve. Make sure to only integrate between max/min potential and vice versa and you can get the values of the positive and the negative half curves.
Maybe the instrument calculates only half the area (above or below zero), while origin calculates the whole area in your case. This could explain the doubling of the value. I guess you should take the value of one half curve.
Dear Durai,
As explained by Dr Dino and Cornel Radu are sufficient for the deviation, your area calculation is completely depends on the points of selection (input limit of integration). In case of biologic software, the selected data point will appears in different color and the selected/calculated area will be as color shade than initial curve/plot, further the selection of data point can be achieved by computer mouse. but in origin you need to define limit of integration, type of area ( whether math or absolute area) in order to get same value as obtained from biologic software, one should use same limit of integration and type of area. very small variation will appear due to the different math algorithm used by software ( Trapezoid Rule or Simpsons Rule)
It is quite easy using Origin. This can be easily figured through the tutorial link given below - https://www.youtube.com/watch?v=FS3JxZmZnYY&t=29s
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Durai Govindarajan In the following video tutorial, I have discussed how to calculate area under the curve using Origin. Area under the curve signifies many physical and geometrical interpretations in Science. It’s a product of the quantities (functions) on the x and y axes. The video explains all the steps to be performed to calculate area under a specific curve. In the case you want to further ask about it, please do comment on the specific video, I'll respond to it shortly. I have provided the practice file here. Thanks
https://youtu.be/DMsBzGCNHQk