Preparation process and detection method of color starch film
A preparation process and technology of starch film, which is applied in the field of food film, can solve the problem of less consideration of color, sensory quality, etc., and achieve the effect of improving transparency
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[0034] The specific embodiment of the present invention: a kind of preparation technology of colored starch film is characterized in that, comprises the following steps,
[0035] 1) Put potato starch in a clean beaker, add distilled water, and stir at room temperature to form 25g / L starch milk;
[0036] 2) add sodium carboxymethyl cellulose and glycerol to the starch milk in the ratio of m starch:vcmc-Na:v glycerol=5:2:3 (g / g / mL);
[0037] 3) Add food coloring, food coloring includes black bean red pigment, sunset yellow or grape purple; the added food coloring and its addition amount are respectively: black bean red (0.8, 0.6, 0.4, 0.2g / kg starch, the prepared film is sequentially Denoted as S1, S2, S3, S4), sunset yellow (0.2, 0.1g / kg starch, the prepared film is denoted as S5, S6 in turn), grape purple (0.025g / kg starch, the prepared film is denoted as S7 );
[0038] 4) Stir and gelatinize the above-mentioned mixed emulsion at 90°C for 20 minutes. After the gelatinization...
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