Separation and quantification of neoagaro-oligosaccharides

Area of Science:

• Carbohydrate Chemistry
• Biochemistry
• Analytical Chemistry

Background:

• Agar, a polysaccharide, is a source of valuable oligosaccharides.
• Enzymatic hydrolysis is a key method for breaking down agar.

Purpose of the Study:

• To extract and purify oligosaccharides from agar.
• To identify the molecular weight and structure of the resulting oligosaccharides.

Main Methods:

• Enzymatic hydrolysis of agar.
• Separation and purification using activated carbon adsorption and gel chromatography.
• Characterization by Electrospray Ionization-Mass Spectrometry (ESI-MS) and Carbon-13 Nuclear Magnetic Resonance ((13)C-NMR).

Main Results:

• Activated carbon effectively removed salt impurities.
• Gel chromatography successfully separated two distinct oligosaccharides.
• The molecular weights were determined as 630 and 936.
• The identified oligosaccharides were neoagarotetraose and neoagarohexaose.

Conclusions:

• Enzymatic hydrolysis of agar yields separable oligosaccharides.
• Activated carbon and gel chromatography are effective purification techniques.
• Neoagarotetraose and neoagarohexaose were successfully isolated and identified from agar.