P9. TEST BIURET

OBJECTIVES:
1) Observe the amount of protein that each ingredient has.

MATERIAL:

• Baker 250mL (x5)
• H2O
• NaOH
• CuCO4
• Test tubes (x5)
• MILK with different fat content: full-cream, skimmed milk and soymilk
• egg yolk 
• yolk

PROCEDURES:

We put 100ml of destillated water in all of the beakers

1. in the first beaker we put 10ml of milk
2. in the second beaker we put 10ml of skimmed milk
3. in the third beaker we put 10ml of Soymilk
4. in the four beaker we put 10ml of the yolk
5. in the last beaker we put 10ml of the egg yolk

When we have all of the proteins inside the beaker we need to remove the 

We take 2ml of the 5 diferents dissolution and we put this 2ml inside the test tube

Add 2ml of the NaOH to 20% 

Add 5 drops to the CuCo4 al 1% 

RESULTS:

• Milk: the second aliment have more proteins

• milk skimmed: no proteins

• milk soja: no proteins

• egg yolk: the first aliment to have more proteins

• yolk: have proteins