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Frucooligosaccharides purification: Complexing simple sugars with phenylboronic acid.

Jaime R Porras-Domínguez1, María Elena Rodríguez-Alegría1, Alfonso Miranda1

  • 1Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Col. Chamilpa, C. P. 62210 Cuernavaca, Morelos, Mexico.

Food Chemistry
|February 25, 2019
PubMed
Summary

Researchers developed a method to purify prebiotic fructooligosaccharides (FOS) by selectively removing glucose and fructose. This process significantly enhances FOS purity for use in nutraceutical foods.

Keywords:
FructansFructooligosaccharidesLevansPhenyboronic acidPrebioticsSugar purification

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Area of Science:

  • Biochemistry
  • Food Science
  • Carbohydrate Chemistry

Background:

  • Prebiotic fructooligosaccharides (FOS) are synthesized enzymatically using fructosyltransferases (FTFs).
  • These reactions produce significant amounts of glucose and fructose as by-products.
  • High monosaccharide content limits FOS application in nutraceuticals, necessitating their removal.

Purpose of the Study:

  • To develop a selective method for eliminating monosaccharides (glucose and fructose) from FOS mixtures.
  • To achieve high purity FOS suitable for nutraceutical applications.

Main Methods:

  • Selective complexation of glucose and fructose using phenyl boronic acid (PBAc).
  • Extraction of monosaccharide-PBAc complexes using ethyl acetate.
  • Application of the method to a synthetic FOS mixture derived from enzymatic synthesis.

Main Results:

  • Successfully eliminated glucose and fructose from a complex FOS mixture.
  • Achieved a levan-type FOS product with 97% purity.
  • Demonstrated effective sugar removal using 3:1 molar reactions.

Conclusions:

  • Phenyl boronic acid complexation followed by ethyl acetate extraction is an effective strategy for purifying FOS.
  • This method significantly improves FOS purity, meeting requirements for nutraceutical use.
  • The developed process offers a viable solution for producing high-purity prebiotic ingredients.