L. S. Solomina, D. A. Solomin
All-Russian Research Institute of Starch Products, branch of the Gorbatov Federal Science Center of Food Systems, Russian Academy of Sciences, ul. Nekrasova, 11, pos. Kraskovo, Lyuberetskii r-n, Moskovskaya obl., 140051, Russian Federation
Abstract. The work aimed at the determination of the influence of the main technological factors (reagent consumption, processing temperature, the rotational speed of the extruder screws) of the production of triticale citrate starch by the extrusion method on its physicochemical properties. Citric acid was used as a reagent. The concentration of its solution was changed in the range of 0–0.45% of the weight of starch dry matter. The influence of temperature was determined by varying it in the range of 140–190 C in increments of 10 C; the rotational speeds of the screws varied in the range of 125–145 rpm/min in increments of 5 rpm. The humidity of the mixture in all the experiments was 25%. The physicochemical properties of triticale, wheat, and corn citrate starches were compared with the samples produced at a citric acid concentration of 0.35% to the dry mass of starch, processing temperature of 170 C, and screw rotation speed of 135 rpm. With an increase in the concentration of citric acid from 0% to 0.45%, the solubility of samples of triticale citrate starch increased 2.5 times; the dynamic viscosity of the paste increased 1.8 times. To obtain white triticale citrate starch with a maximum viscosity of 990 MPa*s at a temperature of 160 C, the concentration of citric acid should be 0.35% of the starch dry mass. The solubility of triticale citrate starch reaches its maximum value (100%) at temperatures varying from 170 C to 190 C. Under the same production conditions, the solubility of triticale citrate starch (92.01 ± 0.19%) was higher than that of wheat and corn by 1.97% and 8.89%, respectively; dynamic viscosity (945 ± 4 mPa*s) was higher by 9 MPa*s and 110 MPa*s, respectively. The study results formed the basis of regulatory documentation for the production of triticale citrate starch.
Keywords: triticale starch; citric acid; technological parameters; extrusion method; physicochemical parameters; triticale citrate starch.
Author Details: L. S. Solomina, Сand. Sc. (Tech.), leading research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); D. A. Solomin, head of division.
For citation: Solomina LS, Solomin DA. [Formation of triticale citrate starch properties]. Dostizheniya nauki i tekhniki APK. 2020;34(5):73-6. Russian. doi: 10.24411/0235-2451-2020-10515.