Simultaneous Determination of Anthocyanin and Ponceau 4R in Drink Powders by Derivative Spectrophotometry and Partial Least-Squares Multivariate Spectrophotometric Calibration |
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| Authors: | Mahmure ü ?zgür Abdürrezzak Bozdo?an Ay?e Er?a? and ?kbal Koyuncu |
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| Institution: | (1) Drug and Food Control Department, Faculty of Pharmacy, Medical Sciences/University of Tehran, P. O. Box 14155/6451, Tehran, Iran;(2) Ministry of Health and Medical Education, Tehran, Iran |
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| Abstract: | Two methods for the simultaneous determination of anthocyanin and ponceau 4R in drink powders by second derivative spectrophotometry and by partial least-squares multivariate spectrophotometric calibration are described. The procedures do not require any separation step. The methods were applied to determine both colorants in commercial gelatin powders; the results obtained are compared. |
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