======Testing for Starch in Food======


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**Alternative titles:** Iodine Starch Test
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====Summary====                   
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====Procedure====  
  -Place small samples of different foods on a paper plate or paper towel.  
  -Predict which foods you think will contain starch.  
  -Add one drop of iodine to each food sample.  
  -Observe color changes: blue/purple/black indicates starch is present, brown/yellow means little or no starch.  
  -If color is hard to see, mix the sample with a little water first, then add iodine.



====Links==== 
Test for starch | Food chemistry | Chemistry - KClassScienceChannel: 
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📄 Testing for Starch in Food -  Sciencecityed: [[https://www.instructables.com/Testing-for-Starch-in-Food/?fbclid=IwAR1basA2mt87JkCJtDxQtL61cn3BPGPa5nw1q88A9me375DsQ2mlGrZ48Z4]]\\


====Variations====
  *Test a wider range of foods such as rice, pasta, bananas, and beans.  
  *Compare raw vs. cooked samples of the same food.  
  *Try testing processed foods like cereals or chips.



====Safety Precautions====
  *Wear gloves and protect clothing—iodine stains.  
  *Do not ingest iodine or tested samples.  
  *Dispose of food and iodine safely after testing.




====Questions to Consider====
  *Why do some foods contain starch while others do not? (Plants store energy as starch, while foods like fruit store sugars.)  
  *Why does iodine change color in the presence of starch? (It reacts with amylose, a component of starch, forming a blue-black complex.)  
  *How does cooking affect starch detection in foods?