A method based upon the newly developed algorithm of evolving factor anal. and target transformation technique was proposed for study of chem. equilibrium The method was called Target Transformation Evolving Factor Anal. (TTEFA). The TTEFA method not only could give the no. of factors and the distribution of resp. factors, but also could calculate the equilibrium constants quant. The method was applied to study the acid dissociation constants of the anal. reagent Bromopyrogallol Red (BPR). The all of 5 dissociation constants for BPR were found by the TTEFA method with satisfactory results.

Key words: EQUILIBRIUM CONSTANT, CHEMICAL EQUILIBRIUM, BROMOPYROGALLOL RED, FACTOR ANALYSIS