Extraction of Citric Acid from Fruit Juices Using Supported Liquid Membrane.

This study deals with facilitated transport of citric acid using supported liquid
membrane composed of polytetrafluroethylene membrane as the support, Aliquat-
336, toluene, sodium carbonate1sodium bicarbonate as carrier, organicmembrane
and strip phase, respectively, from aqueous solutions and fruit juices.
The optimum citric acid extraction conditions from aqueous solutions in batch
mode were investigated and the standardized conditions were applied for extraction
of citric acid from fruit juices. Complete and partial (33%) citric acid extraction
was achieved from sweet-lime, lemon, and orange juices with sodium carbonate1sodium
bicarbonate and distilled water as strip solutions, respectively.
PRACTICAL APPLICATIONS
The present study of facilitated and controlled extraction of citric acid from citrus
fruit juices using supported liquid membrane stands as an alternative method of
de-souring citrus fruit juices for improving the palatability and consumer acceptability
of the processed citrus fruit juice. The standardized various extraction
parameters provide optimum conditions for complete or partial citric acid from
model systems and fruit juices.