(Received: June 15, 2001; Accepted for publication: July 19, 2001; Published on Web: January 7, 2002)
The graph digitizer "GetValue" which assists in electrochemical analysis was programmed in Visual Basic language. The program has two subroutines of electrochemical analyses. One is for the estimation of diffusion coefficient using Cottrell's equation. The other is for the battery analysis using the plot of current vs. voltage. After digitizing a chart, the user can analyze obtained data by each method. The program can also be used as the standard graph digitizer that assists in obtaining numerical data from a chart on paper. A function that makes two specific points horizontal is equipped with the program to correct the inclination of the image. Specified points can be obtained in seven series. Numerical data are displayed in a table, and can be transferred to the clipboard. Either specified or interpolated methods can be selected, which enabled the efficient obtaining of numerical data.
Keywords: GetValue, Graph digitizer, Electrochemical analyzer, Visual Basic
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