%0 Journal Article
%T Analytical and Stability Studies on Medical Cosmetics
%A Manal I. Eid
%A Mary E. K. Wahba
%J American Journal of Analytical Chemistry
%P 277-281
%@ 2156-8278
%D 2012
%I Scientific Research Publishing
%R 10.4236/ajac.2012.33037
%X Two simple and sensitive spectrofluorimetric (method ¦©) and spectrophotometric (method ¦©¦©) methods have been developed for the determination of some chloride containing toothpastes and panthenol-containing cosmetic preparations respectively. Method ¦© is based on quantitative fluorescence quenching of (terbium-salicylate-hexamine ternary complex) by fluoride which could be measured at ¦Ëem/¦Ëex of 547 nm/322 nm. The ¦¤F-concentration plot was rectilinear over the concentration range of 0.5 - 20 ¦Ìg/ml. Method ¦©¦© 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 ¦Ìg/ml.
%K Panthenol
%K Spectrophotometry
%K Spectrofluorimetry
%K Stability Studies
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=18278