Method for identifying doping of potassium iodide in algae iodate and application thereof
A technology of seaweed iodine and potassium iodide, which is applied in the direction of analyzing materials through chemical reactions and observing the impact on chemical indicators, etc., can solve the problems of inability to efficiently measure seaweed iodine adulteration, and achieve simple identification methods easy effect
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[0024] Example 1
[0025] Add 0%, 2%, and 5% potassium iodide to the equal parts of seaweed iodine, respectively, and mix them evenly to obtain A, B, and C three kinds of seaweed iodized salts, respectively.
[0026] Take 1g of A, B, C seaweed iodine-containing substances in test tubes, add 10mL of distilled water to each, dissolve seaweed iodine-containing substances, take 0.5mL of seaweed iodine solution, and add 2mL of 0.3wt.% FeCl 3 solution, shake well, add 1.0 mL of 0.5wt.% starch reagent, adjust the pH to 6.9~7.2, heat in a water bath at 60°C for 5 minutes, and observe the color change. The color changes are shown in Table 1:
[0027] Table 1
[0028] Color changes A brown to orange B brown to blue C brown to dark blue
Example Embodiment
[0029] Example 2
[0030] Add 0%, 2%, and 5% potassium iodide to the equal parts of seaweed iodine, respectively, and mix them evenly to obtain A, B, and C three kinds of seaweed iodized salts, respectively.
[0031] Take 1g of seaweed iodine of A, B, and C respectively in test tubes, add 10mL of distilled water to each, dissolve seaweed iodine, take 0.5mL of seaweed iodine solution, add 2.5mL of 0.1wt.% FeCl 3 solution, shake well, then add 2.0mL of 0.1wt.% starch reagent, adjust the pH to 6.9~7.2, heat in a water bath at 40°C for 8min, and observe the color change. The color changes are shown in Table 2:
[0032] Table 2
[0033] Color changes A brown to orange B brown to blue C brown to dark blue
Example Embodiment
[0034] Example 3
[0035] Add 0%, 2%, and 5% potassium iodide to the equal parts of seaweed iodine, respectively, and mix them evenly to obtain A, B, and C three kinds of seaweed iodized salts, respectively.
[0036] Take 1 g of seaweed iodine of A, B, and C into test tubes, add 10 mL of distilled water to each, dissolve seaweed iodine, take 0.5 mL of seaweed iodine solution, and add 0.5 mL of 1.5wt.% FeCl 3 solution, shake well, then add 1.0 mL of 1.0 wt.% starch reagent, adjust the pH to 6.9~7.2, heat in a water bath at 60 °C for 5 min, and observe the color change. The color changes are shown in Table 2:
[0037] Table 2
[0038] Color changes A brown to orange B brown to blue C brown to dark blue
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