Determination of vitamins A and E in milk samples by fluorescence in micellar media |
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Authors: | Ramos-Lledó P Vera S San Andrés M P |
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Institution: | Dpto. Química Analítica, Facultad de Química, Universidad de Alcalá, 28871 Alcalá de Henares, Spain. |
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Abstract: | The fat-soluble vitamins A and E in milk samples were determined by fluorescence at room temperature in an aqueous media of micellar solutions. Different types of surfactants were studied; the cationic hexadecyltrimethylammonium bromide (CTAB), the anionic sodium dodecylsulfate (SDS) and the non-ionic polyoxyethylene(23)laurylether (Brij 35). The detection limits ranged between 50 and 90 ng.L-1 for both vitamins in CTAB and Brij 35. The method has been applied to the determination of vitamins A and E in milk samples. |
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