Abstract
A methyl orange adsorption method was developed to estimate the content of kudzu starch in commercial kudzu starch products mixed with sweet potato starch. Suitable conditions for adsorption of methyl orange on kudzu starch and kudzu-sweet potato starch mixture were as follows: adsorption time, 30min; concentration of methyl orange solution, 0.020%. A good correlation between the amount of methyl orange adsorbed on kudzu starch and kudzu-sweet potato starch mixture and the content of kudzu starch in kudzu and sweet potato starch mixture was found (correlation coefficient, -0.9980). The methyl orange adsorption method could be used to estimate the content of kudzu starch in commercial kudzu starch product.
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