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Extraction and deproteinization of pumpkin polysaccharide.

Gangliang Huang¹, Ya Chen, Xueqin Wang

¹College of Chemistry, Chongqing Normal University, Chongqing 400047, China. huangdoctor226@163.com

International Journal of Food Sciences and Nutrition

|April 19, 2011

Summary

Comparing pumpkin polysaccharide extraction methods, the trichloroacetic acid (TCA) method showed minimal deproteinization but slightly higher polysaccharide loss. Calcium chloride (CaCl2) proved more effective than sodium chloride (NaCl) for deproteinization.

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A Quantitative Glycomics and Proteomics Combined Purification Strategy

A Quantitative Glycomics and Proteomics Combined Purification Strategy

Published on: March 8, 2016

Area of Science:

Food Science
Biochemistry
Analytical Chemistry

Background:

Polysaccharides are valuable biomaterials found in various food sources, including pumpkins.
Efficient extraction and purification are crucial for characterizing and utilizing pumpkin polysaccharides.
Deproteinization is a key step in polysaccharide isolation, impacting yield and purity.

Purpose of the Study:

To evaluate and compare different deproteinization methods for pumpkin polysaccharide extraction.
To determine the optimal method balancing deproteinization efficiency and polysaccharide loss.
To provide insights into selecting appropriate chemical treatments for polysaccharide purification.

Main Methods:

Hot water extraction was employed to obtain crude pumpkin polysaccharide.
Three deproteinization methods were assessed: trichloroacetic acid (TCA), sodium chloride (NaCl), and calcium chloride (CaCl2).
Deproteinization efficiency and polysaccharide loss were quantified for each method.

Main Results:

The trichloroacetic acid (TCA) method resulted in the lowest deproteinization percentage.
The TCA method exhibited a slightly higher polysaccharide loss compared to NaCl and CaCl2 methods.
Calcium chloride (CaCl2) demonstrated superior deproteinization efficiency over the sodium chloride (NaCl) method.

Conclusions:

The choice of deproteinization method significantly impacts pumpkin polysaccharide yield and purity.
Calcium chloride (CaCl2) is a more effective deproteinization agent than sodium chloride (NaCl) for pumpkin polysaccharides.
Further optimization may be needed to minimize polysaccharide loss when using the TCA method.