Organic acids analysis in “Brandy de Jerez" by ion-exclusion chromatography, "post-column" buffering and conductimetric detection D.A. Guillén, C.G. Barroso, L. Zorro, V. Carrascal and J.A. Pérez-Bustamante Analusis, 26 4 (1998) 186-189 DOI: 10.1051/analusis:1998132