Abstract
We present a new method for the decomposition of an experimental absorbance matrix into concentration and molar absorption coefficient matrices. The decomposition in general is not unambiguous; therefore, the method may yield only ranges for these matrices. The experimental matrix is not changed, so deviations from the original data can be monitored element by element. Consequently, all chemical constraints (such as stoichiometry) can be taken into account. The method, which does not require an explicit chemical model, is used to analyze the reaction between a Co(II)−EDTA complex and H2O2.