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Comparative Studies on the Production of Glucose and High Fructose Syrup from Tuber Starches

Author Affiliations

  • 1 Division of Crop Utilization, Central Tuber Crops Research Institute, Thiruvananthapuram- 695 017, Kerala, INDIA

Int. Res. J. Biological Sci., Volume 2, Issue (10), Pages 68-75, October,10 (2013)


Glucose and high fructose syrup (HFS) are made extensively from corn starch and the high cost of production demands the lookout for alternative starches as raw material. The present study was to compare the potential of tuber starches such as arrowroot, cassava, Curcuma, Dioscorea, sweet potato and Xanthosoma with corn starch for HFS production. The process consisted of liquefaction followed by saccharification and isomerization using three enzymes such as Liquezyme, Dextrozyme and Sweetzyme respectively. High performance liquid chromatographic (HPLC) profile showed that the starch conversion to glucose for the starches was equivalent or superior to that for corn starch. Sugar profile of the saccharified slurry had a composition of 98.28 to 98.84% glucose, maltose (1.03 to 1.69%) and maltotriose (0.03 to 0.10%) for arrowroot, Curcuma and cassava, while a lower range of glucose (94.76-97.28%) and higher range of maltose and maltotriose (2.0-4.3% and 0.49-0.75% respectively) for the other starches. Percentage conversion to fructose as well as fructose yield (g/100g starch) was the highest for arrowroot and Curcuma starches. Tuber starches offer promise as substitute for corn starch in the production of glucose and high fructose syrup.


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