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Related Experiment Videos

Inulin determination for food labeling.

A Zuleta1, M E Sambucetti

  • 1Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junín 956, (1113) Buenos Aires, Argentina.

Journal of Agricultural and Food Chemistry
|October 16, 2001
PubMed
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A new, rapid anion-exchange high-performance liquid chromatography (HPLC) method accurately quantifies inulin in foods. This technique offers a faster, cheaper alternative for routine inulin analysis and food labeling.

Area of Science:

  • Food Science
  • Analytical Chemistry
  • Nutritional Science

Background:

  • Inulin and oligofructose are valuable nutritional supplements, acting as soluble fiber or macronutrient substitutes.
  • Traditional analytical methods for dietary fiber are insufficient for accurate fructan measurement.
  • Existing specific methods for fructans often involve complex enzymatic treatments.

Purpose of the Study:

  • To develop a simple, rapid, and accurate method for determining inulin content in various food products.
  • To provide a reliable analytical technique suitable for routine food labeling purposes.

Main Methods:

  • Water extraction of inulin from food samples.
  • Anion-exchange high-performance liquid chromatography (HPLC) using an Aminex HPX-87C column.

Related Experiment Videos

  • Detection of inulin using a refractive index detector with deionized water as the mobile phase at 85°C.

    • Main Results:

    • The developed HPLC method demonstrated high accuracy with an average recovery of 97%.
    • The method exhibited excellent precision, with coefficients of variation ranging from 1.1% to 5% across different food matrices.
    • Successful quantification of inulin was achieved in both tailor-made and commercial food products, including cookies, milk, ice cream, cheese, and cereal bars.

    Conclusions:

    • The developed anion-exchange HPLC method is an effective, easy, and rapid technique for inulin determination.
    • This method offers a cost-effective and precise alternative to existing techniques for routine inulin analysis in foods.
    • The validated method is suitable for accurate inulin quantification for food labeling purposes.