I`ve done cyclic voltammetry test.
I want to calculate specific capacitance from that.
What I tried to do was like below
(Area inside graph)/(2*mass loading*scan rate)
I plotted date with SigmaPlot 12. Anyone know how to do integral in SigmaPlot?
Artur
Firstly thanks for let me correct. Do you know how to do integration with plot?
To find area under curve using SigmaPlot-
1. Plot graph - scatter - Y vs X
2. Select any one point in graph
3. go to "Tools" menu --> "Macros" --> "Macros" click it
4. First option you get in the pop up dialog box is "Area Below Curves"
5. Press "RUN"
6. Press "Compute"
7. In the box preceding --> You get value for Area
Note:
Area below curve = INTEGRAL of "x.dx" from X0 to X (known as graphical integration technique).
Hope this helps.
HI Uliana Sbeguen Stotzer
Which version of S/w did you use? I'm using 9.0.
It is working fine in my case.
Thanks Venkatesh .I have just solved it. It was a problem as I typed the data. Now I'm trying to figure out how to do statistics with the values of the area. Do you know?Thanks a lot.
Thanks Venkatesh! It was really helpful even I use 12.0 version. wish you all the best!
I have a Sigmaplot 11.0. How can i calculate the are under the curve?
Should i creat a new macro for it? Iam following the steps mentioned above, but at the end it not result. I think that the problem is the macro! How can i solve it?
An update to my earlier answer:
Use SP inbuilt worksheet to find area, not Excel worksheet. See the attached screenshot from help menu of SP.
Venkatesh Kamath H What would be the unit of that area. what should be the unit of scan rate, loading mass and voltage if I want to get the specific capacitance as F/g.
Sukhyeun Jang 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
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