Electroanalytical determination of the sunscreen agent octocrylene in cosmetic products / J. B. G. Jùnior in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 1 (02/2012)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 34, N° 1 (02/2012) . - p. 91-96 Titre : Electroanalytical determination of the sunscreen agent octocrylene in cosmetic products Type de document : texte imprimé Auteurs : J. B. G. Jùnior, Auteur ; T. A. Araujo, Auteur ; M. A. G. Trindade, Auteur ; V. S. Ferreira, Auteur Année de publication : 2012 Article en page(s) : p. 91-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse électrochimique Octocrylène Produits antisolaires Index. décimale : 668.5 Parfums et cosmétiques Résumé : An electroanalytical method was developed to detect and quantify the sunscreen agent octocrylene (OCR) in cosmetic products. The method was based on electrochemical reduction, using voltammetric techniques. OCR was reduced at −0.97 V vs. Ag/AgCl on a glassy carbon electrode using a mixture of Britton–Robinson buffer (0.04 mol L−1) and ethanol (7 : 3, v/v) as the supporting electrolyte solution. Under optimized conditions and square-wave voltammetry, OCR response was linear from 5.0 × 10−6 to 8.0 × 10−5 mol L−1 (r = 0.9995), with a limit of detection of 2.8 × 10−6 mol L−1. The proposed electroanalytical method proved simple, fast and suitable for detection and quantification of OCR in samples of cosmetic products, with satisfactory results in the recovery test and analytical determination in real samples. Note de contenu : - MATERIALS AND METHODS : Apparatus - Reagents and solutions - Sample preparation - Procedure for voltammetric measurement - RESULTS AND DISCUSSION : Voltammetric behaviour - Effect of instrumental parameters - Effect of accumulation potential and accumulation time - Analytical application DOI : 10.1111/j.1468-2494.2011.00686.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2011.00686.x Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13283 [article]

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How to overcome the new challenges in sun-care / Myriam Sohn in SOFW JOURNAL, Vol. 146, N° 7/8 (07-08/2020)  

[article]  inSOFW JOURNAL > Vol. 146, N° 7/8 (07-08/2020) . - p. 2-12 Titre : How to overcome the new challenges in sun-care Type de document : texte imprimé Auteurs : Myriam Sohn, Auteur ; Stanislaw Krus, Auteur ; Marcel Schnyder, Auteur ; Stephanie Acker, Auteur ; Mechtild Petersen-Thiery, Auteur ; Sascha Pawlowski, Auteur ; Bernd Herzog, Auteur Année de publication : 2020 Article en page(s) : p. 2-12 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Aspect de l'environnement Ethylhexyl Méthoxycinanamate Formulation (Génie chimique) Ingrédients cosmétiques -- Suppression ou remplacement Octocrylène Peau -- Soins et hygiène Produits antisolaires Index. décimale : 668.5 Parfums et cosmétiques Résumé : Sunscreen producers and UV filter manufacturers are currently facing urgent challenges. On the one hand, the legal situation of two widely used UVB filters Ethylhexyl Methoxycinanamate (EHMC) and Octocrylene (OCR) is unclear due to rising concerns on their safety for humans and the environment; on the other hand, the image of nano particulate UV filters is downgraded in the press and by digital apps questioning their safety profile without scientifically based evidence. Some producers pro-actively remove these UV filters from their new sunscreens' developments which is a real challenge in terms of performance achievement. This paper aims to provide UV filter system alternatives for developing efficient sunscreens without EHMC and OCR. Additionally, it clarifies the safety situation of nano-particulate UV filters and explains their usefulness in sunscreens, providing, however, UV filter system alternatives. Furthermore, this manuscript presents a calculation method to assess the impact of a UV filter combination on the environment and shows that it is possible to develop eco-sustainable sunscreens. Though, each restriction in the choice of UV filters will imply certain compromises. Note de contenu : - MATERIAL AND METHODS : Formulations for octocrylene and ethylhexyl methoxycinnamate free systems - Measurement of free radicals - Blue light transmittance measurements - Assessment of the EcoSun pass value - RESULTS : Sunscreens without octocrylene and ethylhexyl methoxycinnamate - Nano particulate UV filters in sunscreens - Environmental impact of sunscreens - Fig. 1 : Photostability profile of a) Photostable UVA and b) Partly stabilized UVA sunscreens ; irradiation performed as described in ISO24443:2012 - Fig. 2 : Specific UV extinction E (1,1) for different particle size of TBPT - Table 1 : Investigated UV filter combinations for sunscreens without EHMC and OCR - Table 2 : Maximum authorized concentration and status of European approved UV filters - Table 3 : INCI, efficacy E (1,1) max and handling of alternative UVB filters in Europe - Table 4 : SPF, UVA-PF, and generated free radicals (%) of DHHB or BMDBM based UV filter combinations - Table 5 : Features of nano and some soluble registered UV filters - Table 6 : UV combinations without nano filters for SPF 30, 50 and 50+ with a ratio UVA-PF/SPF of at least 1/3 - Table 7 : Ecosun Pass value and SPF of five UV filters combinations En ligne : https://drive.google.com/file/d/1O3nEeRuS9ZgrfESGbXfMJxKbSBGJjGCi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34614 [article]

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