Application of absorbancy ratios to the analysis of pharmaceuticals. II. Practical aspects of the analysis of binary mixtures.

The simultaneous analysis of the components of binary systems may be easily carried out by utilizing the theoretical principles inherent in the absorbancy ratio technique. The limitations of this method of analysis are few and occur because of the failure of Beer's law under extreme experimental conditions or the absence of optimum spectral characteristics for the substances being investigated. The advantages of the method outweigh these limitations and, as a result, the technique may be used in a variety of situations where the control of binary systems is of importance to the analytical chemist.