The COJ (a commercial blend of juices from the Natal and Valencia
varieties, 66°Brix, with pH 3.8, 3.2% of acidity expressed as citric acid
and 11.7% of pulp content) was directly obtained from a local producer
(Citrosuco, Limeira, São Paulo, Brazil). All samples came from the same
lot, and were divided into several 1 L bottles, to facilitate handling. The
bottleswere stored in a conventional freezer at−18 °C before and after
processing.