======Food Test for Fats and Oils======


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**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Alternative titles:** Ethanol Test for Lipids
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====Summary====                   
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====Procedure====  
  -Place the food sample into a test tube with about 2 cm³ of ethanol.  
  -Shake well and let it stand for 2 minutes so lipids can dissolve.  
  -Pour the clear ethanol extract into another test tube containing 2 cm³ of distilled water.  
  -Observe: a cloudy white emulsion shows lipids are present; clear solution means no fats.



====Links==== 


Test for Fats - JamJarMMX: 
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Ethanol Emulsion Test for Fats - A Level Biology - Revisify: 
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📄 Food test 3 - Emulsion (ethanol) test for Fats - Biology Notes for IGCSE: [[https://biology-igcse.weebly.com/-food-test-3---emulsion-ethanol-test-for-fats.html]]\\


====Variations====
  *Compare results from plant oils (e.g., olive oil) and animal fats (e.g., butter).  
  *Test raw vs. cooked food samples.


====Safety Precautions====
 
  *Wear goggles and gloves.  
  *Keep ethanol away from flames—it is highly flammable.  
  *Dispose of test mixtures safely; do not ingest tested samples.



====Questions to Consider====
  *Why do lipids form a cloudy emulsion in water? (They are insoluble in water and form tiny droplets that scatter light.)  
  *Why is ethanol used instead of water to dissolve fats? (Lipids are soluble in ethanol but not in water.)  
  *Which foods do you predict will test positive for lipids?