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Merck

The debittering of navel orange juice using polymeric films.

Journal of food science (2007-11-13)
Stéphane C Fayoux, Ruben J Hernandez, Robert V Holland
ABSTRACT

In order to better understand and optimize the sorption of limonin (the major navel orange juice bitter principle) by various plasticized polymeric films, a sorption and plasticizer migration study was carried out using high-performance liquid chromatography (HPLC) and gas chromatography (GC). Low molecular weight (LMW) poly (vinyl chloride) (PVC) plasticized with dioctyl adipate (DOA) gave the best results for both limonin sorption and low DOA migration. Thick films did not significantly sorb more limonin than thin films in the timeframe of our experiments, as the absorption involved rapid surface sorption followed by slow bulk diffusion. The debittering efficiency was a 1000-fold greater than that obtained with current polystyrene divinylbenzene resin beads, with potential for industrial scale debittering.

MATERIALS
Product Number
Brand
Product Description

Supelco
Bis(2-ethylhexyl) adipate, Selectophore, ≥99.0%
Sigma-Aldrich
Bis(2-ethylhexyl) adipate, ≥97.0% (GC)
Sigma-Aldrich
Bis(2-ethylhexyl) adipate, ≥99%
Supelco
Di(2-ethylhexyl)adipate solution, certified reference material, 2000 μg/mL in methanol
Supelco
Bis(2-ethylhexyl) adipate, 99%
Sigma-Aldrich
Limonin, from citrus seeds, >90% (HPLC)