AJAC  Vol.3 No.3 , March 2012
Analytical and Stability Studies on Medical Cosmetics
Abstract: 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 547 nm/322 nm. The ΔF-concentration 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 480 nm. The absorbance-concentration plot was rectilinear over the concentration range of 2 - 20 μg/ml.
Cite this paper: M. I. Eid and M. E. K. Wahba, "Analytical and Stability Studies on Medical Cosmetics," American Journal of Analytical Chemistry, Vol. 3 No. 3, 2012, pp. 277-281. doi: 10.4236/ajac.2012.33037.

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