2.1. Materials
Apples (cv. Granny Smith) were bought in a local market and
stored at 5 C during 48 h prior to juice extraction. High methoxyl
pectin Genu Pectin Type 121 Slow Set (Cp Kelco, Brasil) was
donated by Cp Kelco Argentina. Anhydrous citric acid Parafarm
(Saporiti, Argentina) was used to regulate the pH. Food grade sucrose
and potable bottled water, each from the same batch, were
bought in the local market.