@article{Wahba_2015, title={Analytical and stability studies on medical cosmetics}, volume={1}, url={https://updatepublishing.com/journal/index.php/rip/article/view/213}, abstractNote={Two simple and sensitive spectrofluorimetric (method Ι) and spectrophotometric (method ΙΙ) methods have been developed for the determination of some chloride containing toothpastes and panthenol-containing cosmetic preparations respectively. Method Ι is based on quantitative fluorescence quenching of (terbium-salicylate-hexamine ternary complex) by fluoride which could be measured at λem/λex of 547nm/322nm. The ∆Fconcentration plot was rectilinear over the concentration range of 0.5-20 µg/ml. Method ΙΙ depends reaction of panthenol with nitrobenzoxadiazole chloride (NBD-Cl) and measuring the absorbance of the resultant product at 480nm. The absorbance- concentration plot was rectilinear over the concentration range of 2-20 µg/ml}, number={3}, journal={Research in Pharmacy}, author={Wahba, M. I. Eid* and M. E. K.}, year={2015}, month={Oct.} }