You use Sudan III test for Lipids.
1)Prepare a sample of the food(you don't need to filter it) Transfer about 5cm^3 into a test tube.
2)Use a pipette to add 3 drops of Sudan III stain solution and gently shake the tube.
3)Sudan III stains solutions, so if the solution contains lipids it will split into two layers. The top layer will be bright red like a brick, however if there are no lipids present, there will be no seperate red layer.
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