Analytical and stability study of some unstable materials used in cosmetic preparations with toxic or harmful degradation products /
Safaa Hussein Salah Eldin Hussein
Analytical and stability study of some unstable materials used in cosmetic preparations with toxic or harmful degradation products / دراسة تحليلية ودراسة ثبات لبعض المواد الغير مستقرة المستخدمة في مستحضرات التجميل والتي لها نواتج تكسير ضارة أو سامة Safaa Hussein Salah Eldin Hussein ; Supervised Amal Mahmoud Aboualalamein , Fawzi Alanwar, Hanan Mohamed Elwy - Cairo : Safaa Hussein Salah Eldin Hussein , 2018 - 262 P. : charts ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Pharmacy - Department of Analytical Chemistry
This thesis includes five parts: Part Ї: General introduction and literature review Part ЇЇ: Spectrophotometric methods for simultaneous determination of Avobenzone and Octinoxate in a mixture. This part includes four sections 1- Derivative spectrophotometry technique which involves two methods -First derivative spectrophotometry -First derivative of ratio spectra spectrophotometry 2- Ratio difference spectrophotometry. 3- Mean Centering Spectrophotometry 4- Modified Vierordts method Part ЇЇЇ: Chemometric methods for simultaneous determination of Avobenzone and Octinoxate in a mixture. Part ЇV: Chromatographic techniques, this part includes two sections Section A. Thin Layer Chromatographic Methods A.1. TLC densitometric method for determination of Imidazolidinyl urea / Diazolidinyl urea in presence of its toxic degradation product; Formaldehyde. A.2. HPTLC- densitometric method for determination of Avobenzone / Octinoxate simultaneously by in presence of Paraben. Section B. High Performance Liquid Chromatographic Methods B.1. Stability indicating method for determination of Imidazolidinyl urea / Diazolidinyl urea in mixture with other preservatives by RP-HPLC method. B.2. Determination of Avobenzone and Octinoxate simultaneously in presence of their alkaline, acidic and photo-degradation products by RP-HPLC. Part V: Electrochemical techniques -Kinetic study of Chlorhexidine using ion selective electrode The thesis refers to 202 references, contains 77 tables and 69 figures
Avobenzone Imidazolidinyl urea Octinoxate
Analytical and stability study of some unstable materials used in cosmetic preparations with toxic or harmful degradation products / دراسة تحليلية ودراسة ثبات لبعض المواد الغير مستقرة المستخدمة في مستحضرات التجميل والتي لها نواتج تكسير ضارة أو سامة Safaa Hussein Salah Eldin Hussein ; Supervised Amal Mahmoud Aboualalamein , Fawzi Alanwar, Hanan Mohamed Elwy - Cairo : Safaa Hussein Salah Eldin Hussein , 2018 - 262 P. : charts ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Pharmacy - Department of Analytical Chemistry
This thesis includes five parts: Part Ї: General introduction and literature review Part ЇЇ: Spectrophotometric methods for simultaneous determination of Avobenzone and Octinoxate in a mixture. This part includes four sections 1- Derivative spectrophotometry technique which involves two methods -First derivative spectrophotometry -First derivative of ratio spectra spectrophotometry 2- Ratio difference spectrophotometry. 3- Mean Centering Spectrophotometry 4- Modified Vierordts method Part ЇЇЇ: Chemometric methods for simultaneous determination of Avobenzone and Octinoxate in a mixture. Part ЇV: Chromatographic techniques, this part includes two sections Section A. Thin Layer Chromatographic Methods A.1. TLC densitometric method for determination of Imidazolidinyl urea / Diazolidinyl urea in presence of its toxic degradation product; Formaldehyde. A.2. HPTLC- densitometric method for determination of Avobenzone / Octinoxate simultaneously by in presence of Paraben. Section B. High Performance Liquid Chromatographic Methods B.1. Stability indicating method for determination of Imidazolidinyl urea / Diazolidinyl urea in mixture with other preservatives by RP-HPLC method. B.2. Determination of Avobenzone and Octinoxate simultaneously in presence of their alkaline, acidic and photo-degradation products by RP-HPLC. Part V: Electrochemical techniques -Kinetic study of Chlorhexidine using ion selective electrode The thesis refers to 202 references, contains 77 tables and 69 figures
Avobenzone Imidazolidinyl urea Octinoxate