How will you test the presence of fat in a given sample of food material?
Answers
Answer:
Straighten the paper. Dry the paper by keeping it in sunlight for a while. Observe the paper. An oily patch on the paper indicates the presence of fats in the tested food item.
Explanation:
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Explanation:
Test For Fats
The presence of fats in a sample can be detected by the following tests:
Sudan III Test
Paper Spot Test
1. Sudan III Test
Materials Required
Sudan III Solution
Oil
Test tube
Dropper
Egg Albumin
Procedure
Take a clean and dried test-tube and add a few drops of oil into it.
Now into the same test tube, add five to six drops of the Sudan III reagent with the help of a dropper.
Stir the test tube continuously and allow the solution to stand for a while.
After a few seconds, observe the changes.
Observation
The presence of fat in the sample is indicated when pink colour droplets appear on the test tube.
2. Paper Spot Test
Materials Required
A piece of white paper
Peanut seeds
Watch glass
Procedure
On the piece of white paper, place the fresh peanut seeds.
Crush and rub the peanut seeds in the white paper.
Remove the peanut seed remaining on the watch glass.
Observe the changes on the piece of white paper.
Observation
The spot where the peanut seeds are rubbed turns translucent. This indicates the presence of fats in the sample.