Abstract: According to the characteristics of forgetting factor algorithm, the wavelength points were selected on the basis of correlation coefficient and it was used by taking the sample simulating injection Antongding as example.The result showed that the greater correlation coefficient is adopted, the more accurate result can be obtained.The satisfactory result was also obtained using the absorptivity computed by forgetting factor spectrophotometry instead of multivariate linear regression.So, it gives the full reins to the potential merit of forgetting factor spectrophotometry and provides a better approach to the analysis of multiple Components.

Key words: Forgetting factor spectrophotometry, Multivariate linear regression, Correlation coefficient, Aminopyrine, Antipyrine