TY - JOUR T1 - The Adsorption of Hydroxybenzoic Acids by Poly-N-Vinyl Pyrrolidinone JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 169 LP - 175 DO - 10.5344/ajev.1969.20.3.169 VL - 20 IS - 3 AU - Randall H. Mennett AU - T. O. M. Nakayama Y1 - 1969/01/01 UR - http://www.ajevonline.org/content/20/3/169.abstract N2 - The Freundlich system is shown to fit adsorption of the hydroxybenzoic acids by Polyclar-AT. The system also describes removal of phenols from wine when the phenols are calculated as tannic acid. Equilibrium constants for adsorption of the hydroxybenzoic acids are obtained in order to determine the selectivity of the adsorptive process. The effect of solute acidity is also investigated. ER -