Abstract: A program for baseline correction of EPR spectra is presented.The method in this paper used a polynomial with appropriate order to fit an experimental spectrum baseline.Then the distorted nonlinear baseline is subtracted from the spectrum.After baseline correction,the spectrum is integrated and then the integral result is calculated and tested until the baseline is satisfied.The program written in Borland C⁺⁺ for Windows runs in a few seconds on 486 PC.Experimental results show that the program D simple and very reliable in using and management,especially when used in connection with EPR data acquisition system.

Key words: Baseline correction, EPR, Fitting method