12 research outputs found

    Sobre un caso de actinomicosis (atĂ­pica)y tuberculosis concomitantes : Tesis presentada para optar al tĂ­tulo de doctor en medicina

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    A la cabeza de portada: Universidad Nacional de Buenos Aires. Facultad de Ciencias MĂ©dicas. - Incluye nĂłmina de CatedrĂĄticos y Asignaturas. Tesis con dedicatoria

    Quantification of phenolphthalein in cosmetic products

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    A simple method for the quantification of phenolphthalein in cosmetic formulations is described. The sample, acidified with acetic acid, is extracted with methanol and analysed by reversed-phase HPLC on a column packed with 5 Ό\mum SelectB RP-8. The initial mobile phase is acetonitrile-aqueous 0.1 M acetic acid (10:90), then a linear gradient up to 90% acetonitrile is applied in 30 min. The limit of determination is 1 ng injected when detection is performed at 230 nm
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