Avaliação de similaridade e diferenças entre os pigmentos de esmaltes de unha: utilizando cromatografia em camada delgada

Abstract

This study aimed to perform a comparative evaluation of the pigments present in nail polishes of different brands, using the thin layer chromatography (TLC) technique. Retention factors (Rf) and chemical interactions were analyzed, with a focus on identifying similarities and differences between the chemical formulations. The methodology included the application of various solvents, such as ethyl acetate, hexane, methyl alcohol and acetonitrile, in addition to binary and ternary mixtures, aiming to improve the separation of the pigments. The results revealed that the choice of solvent directly influences the mobility and separation of the components. For the results, it was analyzed that the brands Colorama® and Impala®, in the methyl alcohol eluent in the iodine vapor development, presented the greatest similarity in relation to the pigments used, especially in the colors pink, blue, purple, yellow and red, where all brands showed the same value of retention factor Rf = 1, indicating the presence of similar pigments. In contrast, the Risqué® brand presented significant differences, especially in the green color, where its pigments were not present in the other two brands, with a value of Rf=0.81. Thus, Colorama® and Impala® are the most similar brands in terms of pigment composition, while Risqué® stands out for having a different composition in some colors