Citrozym CEO and Citrozym Ultra L were from NOVOZYMES (Denmark) and had a declared activities of 9,500 PGU/mL and 4,500 PECTU/mL, respectively. Peclyve EP and Peclyve LI were from LYVEN (France). All preparations were produced from Aspergillus strains and their main activities were pectinolytic. Acetone, ethanol, ethyl acetate and hexane were obtained from CARLO ERBA (Italy). Their purities were greater than 99.7%, 99.5%, 99% and 95%, respectively