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Abstract
Desde el punto de vista tecnológico el volumen aparente y la porosidad de un polvo revisten un especial significado en la correcta dosificación en volumen de formas farmacéuticas, y desde el biogalénico en las tasas de disolución y absorción. Para la determinación del volumen aparente, se ha ideado un procedimiento de descenso volumétrico que cumple con las exigencias de las normas AFNOR y D IN. Se describe y aplica, con buen resultado, al estudio de polvos de diversos barbitúricos y con los valores obtenidos se calcula su porosidad.
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