Page 21 - E-book Digestive System

6. Spirtus lamp (Bunsen), three-legged, and kassa wire
7. White Paper
C. Steps
1. Fat Test
a. Provide a piece of white paper and drip it with 1 drop of coconut palm
b. Scratch the foodstuffs on the white paper next to the coconut oil
droplets
c. Let it dry and dry using fire lest the paper burn.
d. Point the paper to sunlight
e. If the traces of scratches of foodstuffs are like traces of coconut oil
droplets, this means that the food contains fat.
2. Test of Amylum, Glucose, Protein.
a. Crush one type of food ingredient to be tested in a lump
b. Add water a little so that it becomes a food solution
c. Put the food solution into three test tubes, each for the test : amylum,
glucose, and protein.
Amilum Test :
a. Drip the food solution with a few drops of lugol,
b. Observe if there is a change in color, record what is happening
c. The color changes to blue to black, indicating that food contains
amylum.
Glucose Test :
a. Drip the food solution with a few drops of Fehling A and a few drops
Fehling B,
b. Use wooden tongs and heated test tubes on spirtus lamps.
c. Observe whether there is a change in color? record what happened
d. When the color changes to yellow to brick red, it means food contains
glucose.
7. Protein Test :
a. Drip the food solution with a few drops of CuSo4 solution and some
drops of NaOH solution.
b. Shake thoroughly
c. Observe whether there is a discoloration in the solution, record what
happened
d. If there is a change in color to purple, it means that the food ingredient
contains Protein

Based on the results of the practice, fill in the following table:
Put a mark (+) when there is one and a sign ( - ) when it is not there.
No Food Fat Amilum Glucose Protein

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