How do i separate glucose and fructose from fruit juice?

Question

How do i separate glucose and fructose from fruit juice?

Answer 1

1. Partial distillation and evaporation.

2. using different solvents, after evaporation, then re-evaporating the solvents.

3. Settlement methods may be posible.

Answer 2

Fructose can be separated from glucose-fructose mixture using a microporous polypropylene supported liquid membrane containing a boronic acid carrier (2% wt; flux 10-8 mol m-2s-1 ( read as ten to the power minus 8 mol m to the power minus 2 and s to the power minus 1) glucose 2.9 and fructose 55.

Ref: Chemistry and Industry March 1997.

Nigel Freeston, Nene College, Northampton.

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Answer 3

Glucose isomerase, an enzyme, is used to convert a portion of the glucose to fructose. The resulting mixture is 42% fructose, 53% glucose and 5% higher sugars. The mixture is refined with carbon filters and ion exchange. The fructose content of the resulting syrup is enriched by chromotographic separation, accomplished by passing the syrup through a column of adsorbent containing calcium or other cation that attracts the fructose portion of the syrup. This step produces a syrup that is about 90% fructose, which is then blended with the 42% fructose syrup to produce one that is 55% fructose, 42% glucose and 3% higher sugars.