Starch, iodide iodized

Jod-saure, /, iodic acid, -schwefel, m. sulfur iodide, -serum, n. iodized serum, -silber, n. silver iodide, -silizium, n. silicon iodide. -stSrke, /. starch iodide, iodized starch. -stSrkepapier, n. starch iodide paper, -stick-stoff, m. nitrogen iodide, -thymol, n.iPhaTm.) thymol iodide, -tinktur,/. tincture of iodine, -toluol, n. iodotoluene. -iibertrilger, m. iodine carrier. 

The preparation of starch blue in aqueous solution with iodine-iodide mixtures is the most common procedures. According to the method of Pals56 starch (10 mg) of water (5 mL) is boiled for 5 min and blended with 7.6 X 10 5 mol/L (5 mL) of an aqueous solution of iodine and 4.27 x 10 5 mol/L (5 mL) of an aqueous solution of KI. The complex is precipitated by the addition of an aqueous solution of KF (10 mol/L). The precipitate is centrifuged (5000 rpm for 10 min) and washed with aqueous KF (1 mol/L). The Vanino reagent (barium permanganate) also precipitates iodized starch.57 The resulting complex is stable and has a defined stoichiometry. A similar procedure was described by Meyer and Bemfeld.58 Chinoy... 

A dilute solution of I produces a more or less intense blue-violet color with starch, either dry, hydrated, or in solution, the color disappearing on the application of heat, and returning on cooling. If to a solution of starch, blued by I, a solution of a neutral salt be added, there separates a blue, flocculent deposit of the so-called iodid of starch. lodin renders starch soluble in water, and a soluble iodized starch, Amylum iodatum (TT. S.), is obtained by triturating together 19 pts. starch, 2 pts. water, and 1 pt. iodin, and drying below 40° (104° P.),... 

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