The physico-chemical properties of syrups obtained by acidic and enzymatic hydrolysis of potato starch were investigated. The content of high-molecular dextrins in enzymatically obtained starch syrups was increased by additions of oxidized starch "Sulinex". The enzymatically obtained starch syrups containing 6-10% "Sulinex" were used in caramel mass production.
High saccharified syrups (50-75DE) were obtained by liquefaction of potato starch with α-amylase and saccharification with glucoamylase. Considerably reduced concentrations of glucoamylase preparations were used in hydrolysates to make the process more economical. A part of the experiments concerned enzymatic dissolving and saccharification of starch at constant pH 6. This was performed to avoid accretion of salts, which would have developed in an environment with varying pH.
Using various enzyme preparations it was possible to obtain starch hydrolysates of a concentration of 30-50% d.s. and a saccharification level of 38-77 DE. PH was kept at the constant value of 5,5 both during the dissolution and the saccharification of starch. During the saccharification stage, two enzymes i.e. bacterial α-amylase and glucoamylase, cooperated with each other.