Synthesis Study of Amylum-Carboxymethyl and Amylum-Sulfonate to Increase their Solubility in Water

Modified starch is synthesized to change the physical and chemical properties, one of which solubility. Two new things were produced in substitution process, namely modifications final stage (workup) reaction each substituent, changes neutralization stage/carboxymethyl solids using 30% CH3COOH use methanol pro-analyst sulfonate deposition process. The results solubility test showed that at room temperature a concentration 1.5% g/L, carboxymethyl substituted was completely soluble water, while with same 30°C. viscosity resulted flow time 25.02 seconds for starch-carboxymethyl 10.15 starch-sulphonate. a-amylase identified by thin layer chromatography (TLC) presence reducing sugar stains on hydrolysis product but not starch-sulphonate product. Dinitrosalicylate (DNS) amount much smaller than starch-carboxymethyl.