What colorimetric specificity does the iodine test have for starch versus other carbohydrates?

Add 1 drop of the iodine reagent and see that a deep blue color is developed. The blue color indicates the presence of starch in the solution. Effect of the ... Rinse in water ,place on watch glass and cover with iodine solution. Make sure it is quite dark in colour. You will see the colour change on the leaves very ... By adding an iodine–potassium iodide solution to a solution of cellulose, Abe [56] obtained an intense blue solution. At 80 °C, the color disappeared, but upon ... Chemical tests to identify presence of starch. Substances containing starch turn a blue-black colour in the presence of iodine solution. An observable colour ... ... solution to be tested with 3 drops of starch solution. Iodine solution is then added dropwise until a blue-black color appears. The color is the result of ... Starch solutions are often used as indicators for detecting the presence of iodine. Generally, a 1% starch solution will produce a nice, deep-blue color in the ... Feb 5, 2025 ... The iodine test is used to test for the presence of starch. Starch ... intense “blue-black” colour upon addition of aqueous solution of iodine, ... Other foods—such as peppers, cucumbers, and strawberries—are non-starchy foods, and the iodine solution should not have changed color when you added it to these ... Apr 13, 2018 ... I did several tests with lugol in order to detect presence of starch in a cooking juice. ... starch-iodine complex to re-form. Cite. This blue-black color is the color of the starch iodide complex. Additional Information: When the iodine solution and potassium iodide solution are mixed in ...