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National Repository of Grey Literature
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Development of methods for determination of authenticity of cosmetic products with a plant component
Langová, Denisa
;
Brázda, Václav
(referee) ;
Vorlová, Lenka
(referee) ;
Márová, Ivana
(advisor)
In the final thesis, methods were developed for determining the authenticity of cosmetic products and food products with a plant component. The presence of natural ingredients in a series of model and commercial cosmetic products was verified and their authenticity was verified, too. The focus of the work was the development of a molecular-biological method for the detection of plant components (herbs, fruits, essential oils) and probiotics present in cosmetic products. Commercially available isolation kits were used for the isolation of DNA from cosmetic products and the method was optimized for the isolation of plant DNA present in cosmetic products. The presence of a plant matrix in cosmetic products was detected by the polymerase chain reaction (PCR) method. Instrumental methods were used to detect the presence of fragrance allergens in cosmetic products. A method of quantifying these allergens using liquid chromatography was introduced and the measurement results were compared with the results of gas chromatography with mass detection. The proposed method of isolation and subsequent amplification of plant DNA is suitable for determining the authenticity of herbal ingredients in cosmetic products. The proposed HPLC method is a simple and inexpensive method suitable for determining the allergens present in the amount necessary to comply with EU analyte legislation and in the required sensitivity (except for hydroxycitronellal). Both methods are suitable to be used for the analysis of food products, too.
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