Erdal Dinç

TL;DR: Double divisor-ratio spectra derivative (graphical method), classical least-squares and principal component regression (two numerical methods) methods were developed for the spectrophotometric multicomponent analysis of soft drink powders and synthetic mixtures containing three colorants without any chemical separation.

TL;DR: In this article, a new spectrophotometric method was developed for the simultaneous analysis of a ternary mixture, without prior separation, which is based on the use of the derivative of the ratio spectrum obtained by dividing the absorption spectrum of the mixture by a standard spectrum of a mixture of two of the three compounds in the title mixture.

TL;DR: Four new methods are described for the simultaneous determination of mefenamic acid (MEF) and paracetamol (PAR) in their combination and mean recoveries were found satisfactory (>99%).

TL;DR: The double divisor-ratio spectra derivative and ratio spectra-zero crossing methods were applied to the analysis of an effervescent tablet containing the title compounds without using a chemical separation procedure and indicates that both methods gives the best results.

TL;DR: The accuracy and the precision of the methods have been determined and they have been validated by analyzing synthetic mixtures.