title: Deacidification of cranberry juice by electrodialysis with bipolar membranes.
abstract: Cranberry is recognized for its many benefits on human health; however, its high acidity may be a limiting factor for its consumption. This study aimed to investigate the deacidification of cranberry juice using a two simultaneous step electrodialysis with bipolar membranes (EDBM) process. In step 1 (deacidification), during the 6 h treatment, the pH of the juice increased from 2.47 to 2.71 and a deacidification rate of 22.84% was obtained, whereas in step 2 (pH lowering) the pH of juice 2 was almost stable. Citric, quinic, and malic acid were extracted with a maximum of 25% and were mainly transferred to the KCl 2 fraction. A significant loss of anthocyanins in juice 2 (step 2) was observed, due to their oxidation by oxygen incorporated by the centrifugal pump. This also affected its coloration. The first step of the EDBM process was successful for cranberry juice deacidification and could be improved by increasing the number of membranes stacked.
authors.affiliation: Institute of Nutrition and Functional Foods (INAF) and Department of Food Sciences, Pavillon Paul Comtois, Université Laval , Quebec, QC, Canada G1V 0A6.
authors.forename: Elodie
authors.initials: E
authors.lastname: Rozoy
authors.forename: Leslie
authors.initials: L
authors.lastname: Boudesocque
authors.forename: Laurent
authors.initials: L
authors.lastname: Bazinet
mesh_terms: D000143:Acids / Q000737:chemistry; D000872:Anthocyanins / Q000032:analysis; D001628:Beverages / Q000032:analysis*; D003956:Dialysis / Q000295:instrumentation / Q000379:methods*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D005511:Food Handling / Q000295:instrumentation / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D008567:Membranes, Artificial; D028321:Plant Preparations / Q000737:chemistry*; D029799:Vaccinium macrocarpon / Q000737:chemistry*
chemical_list: D000143:Acids; D000872:Anthocyanins; D008567:Membranes, Artificial; D028321:Plant Preparations
keywords: bipolar membranes; cranberry juice; deacidification; electrodialysis