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PSS GRAM Columns for GPC/SEC Characterization of Natural Starches

Starch is composed of two macromolecules differing in size and structure. Amylose is a weakly branched polymer and amylopectin is a highly branched polymer with a higher molecular weight than amylose. Natural starch characterization with SEC/GPC is a challenge, because of the high number of reactive groups present in the chains, the high molar mass and the structure. Only a well-balanced SEC/GPC method, based on optimized stationary phase and solvent polarity, allows true SEC/GPC separation by size and not by interaction or by a mixed mode of SEC/GPC and LAC.

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