Treated single strength juice is removed from the resin column to create a head space in the column.

Single strength juice is then introduced into the head space and into the resin column.

Rinse the round-bottomed flask with 20 ml of hydrochlorid acid (3.17) and use this to wash the resin column.

There Thompson and Choppin used a cation-exchange resin column and the α-hydroxyisobutyric acid.

The aqueous solution is then passed through an ion retardation resin column to recover the carbohydrate-derived salt, using water as the eluent.