Starch Iodide Paste TB
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Italy
Known as an Italian recipe, with similar versions prepared across other nations.
Ingredients 4 ingredients
- 100 ml water
- a glass rod dipped
- Must
- 5 g potato
Cook safely
Keep children and pets away from the hob and the oven, and keep oven gloves and a lid within reach.
- Boiling water and steam. Turn pan handles inward, away from the edge of the hob. Lift lids away from you, and pour hot water away from your body: steam burns too.
Method
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- Heat 100 ml of water in a 250-ml beaker to boiling, add a solution of 0.75 g of potassium iodide (KI) in 5 ml of water, then add 2 g of zinc chloride (ZnCl,) dissolved in 10 ml of water, and, while the solution is boiling, add with stirring a smooth suspension of 5 g of potato starch in 30 ml of cold water.
- Continue to boil for 2 min, then cool.
- Store in a wellclosed container in a cool place.
- This mixture must show a definite blue streak when a glass rod dipped in a mixture of 1 ml of 0.1 M sodium nitrite, 500 ml of water, and 10 ml of hydrochloric acid, is streaked on a smear of the paste.
- St arch Mucilage TB See starch TS.
Plating
Cookware for this recipe
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Saucepan
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Wooden spoon