Evaluation of aloins, pH and moisture in aloe leaf gel-based personal care products / Gereziher Sibhat in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 1 (02/2022)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 44, N° 1 (02/2022) . - p. 74-81 Titre : Evaluation of aloins, pH and moisture in aloe leaf gel-based personal care products Type de document : document électronique Auteurs : Gereziher Sibhat, Auteur ; Getu Kahsay, Auteur ; van Schepdael Ann, Auteur ; Erwin Adams, Auteur Année de publication : 2022 Article en page(s) : p. 74-81 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aloès et constituants Aloïne L'aloïne, aussi connue sous le nom de barbaloïne, est un composé amer de couleur jaune-marron. Il est présent dans l'exudat d'au moins 68 espèces d'aloès à des concentrations variant de 0,1 à 6,6% m des feuilles sèches (ce qui fait 3 à 35 % de l'exudat total). Chimie analytique Chromatographie en phase liquide Cosmétiques -- Aspect sanitaire Ingrédients cosmétiques Justification de l'allégation Qualité -- Contrôle Tests de sécurité Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Some easily applicable analytical methods were explored to evaluate the quality of personal care products containing aloe leaf gel. Aloins should be absent in these products in view of their side effects. To check this, liquid chromatography (LC) was applied. - Methods : The LC method used a C18 monolithic column combined with gradient elution and ultraviolet (UV) detection. The mobile phase consisted of a mixture of 0.1% formic acid in water (A) and 0.1% formic acid in acetonitrile (B). The method was validated with respect to specificity, linearity, precision and accuracy. Next, it was practically applied for the analysis of commercial samples. In addition, the pH and moisture content were determined. - Results : The LC results indicated that aloins were detected in 25% of the analysed commercial samples. Further, it turned out that 42% of the test samples were found to be in the basic pH range and 33% of them contained excessive moisture. - Conclusion : Proper quality control and adequate labelling of aloe leaf gel-based cosmetics are mandatory to avoid side effects. Note de contenu : - MATERIALS AND METHODS : Chemicals and reagents - Preparation of standards and sample solutions - Liquid chromatographic analysis - Development and validation of the liquid chromatographic method - Determination of pH - Determination of moisture content - RESULTS AND DISCUSSION : Extraction procedure prior to LC - LC method validation - Stability of sample solutions - Analysis of commercial samples - Table 1 : Regression analysis, LOD and LOQ of the proposed LC method for the determination of aloins A and B - Table 2 : Recovery results (%) for aloin A and aloin B after spiking of a shampoo (SH1), soap (S1), hair conditioner (HC), treatment oil (TO) and powder (P2) - Table 3 : Precision results for aloin A and aloin B after spiking - Table 4 : Aloin content (n = 6) of cosmetic products - Table 5 : Moisture content and pH values of aloe gel-based skin and hair care formulations DOI : https://doi.org/10.1111/ics.12755 En ligne : https://drive.google.com/file/d/1Y7AzsZjHAMEboO5cJrBqdWQ_SX05aAJ-/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37260 [article]

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