UV-Chemometric Method Development for Resolving The Overlapped Spectra of Aspirin, Caffeine and Orphenadrine Citrate in Their Ternary Pharmaceutical Dosage Form

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Abstract A simple, specific, accurate and precise UV-chemometric methods have been developed for the analysis of aspirin, caffeine and orphenadrine citrate in their ternary mixture form without prior separation. CLS, PLS and PCR were developed for simultaneous determination of the three drugs together by using different sets of data in which better results were produced. Unfortunately, PLS method was the only method which was able to determine them accurately. The validity of these chemometric methods has been carried out by 8 synthetic mixtures for determination of the power of prediction for each method. Latent variable number is different from one model to another with changing the set of data. Predicted residual error sum of squares (PRESS) and root mean square error of prediction (RMSEP) were used for comparison between different methods and for determination the predictive power of each set of data. In addition, statistical comparison between the proposed chemometric methods was performed.

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