Determination of vitamins A and E in milk samples by fluorescence in micellar media |
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| Authors: | P Ramos-Lledó S Vera M P San Andrés |
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| Institution: | (1) Dpto. Química Analítica, Facultad de Química, Universidad de Alcalá, 28871 Alcalá de Henares, Spain e-mail: mpaz.sanandres@uah.es, ES |
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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.
Received: 30 June 2000 / Revised: 13 September 2000 / Accepted: 16 September 2000 |
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