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Purification and Characterization of Resistant Dextrin.

Yuanhang Zhen^1,2, Tao Zhang^1,2, Bo Jiang^1,2

¹State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.

Foods (Basel, Switzerland)

|January 22, 2021

Summary

An efficient purification method for resistant dextrin (RD) was developed using membrane filtration and anion exchange resin. This process yields high-purity RD with improved properties for food applications.

Keywords:

anion exchange resin characterization membrane filtration purification resistant dextrin

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Area of Science:

Food Science and Technology
Biochemistry
Chemical Engineering

Background:

Resistant dextrin (RD) is a dietary fiber with health benefits.
Current purification methods for RD can be inefficient and impact its properties.

Purpose of the Study:

To develop an efficient purification method for resistant dextrin (RD).
To characterize the purified RD and assess its suitability for the food industry.

Main Methods:

Membrane filtration for removing suspended solids and pigments.
Anion exchange resin (D285) for decolorization.
Characterization using turbidity, spectroscopy, and property analysis.

Main Results:

Membrane filtration reduced turbidity to 2.70 ± 0.18 NTU and removed ~50% of pigments.
D285 resin achieved optimal decolorization (86.26 ± 0.63%) and recovery (85.23 ± 0.42%) ratios.
Purified RD retained its chemical characteristics, molecular weight, and exhibited enhanced solubility, thermal stability, and rheological properties.

Conclusions:

The developed purification method is efficient and preserves the quality of resistant dextrin.
Purified RD demonstrates excellent properties, including heat and digestive enzyme resistance.
The findings support the wide application of purified RD in the food industry.