Fod tests

Testing for simple sugars

Aim

I want to find out how to test for simples sugars

Equipment 

• Bunsen burner
• test tube tongs
• benedicts solution
• food samples
• test tubes
• Safety Glasses

Method

1. Place about 2ml of the sample in a test tube

2. Add 3-5 drops of iodine and mix 

Testing for simple sugars

Aim

I want to find out how to test for simples sugars

Equipment 

• Bunsen burner
• test tube tongs
• benedicts solution
• food samples
• test tubes
• Safety Glasses

Method

1. Place about 2ml of the sample in a test tube

2. Add 3-5 drops of iodine and mix 

Results

Testing for Complex sugars -the Iodine test To test if a sample of food contain complex sugars

Aim: To test if a sample of food contains complex sugars

Equipment: test tube,food sample,iodine solution,

Method:

1.Place about 2 ml of the sample in a test tube
2.Add 3-5 drops of iodine and mix

Result:

If complex sugars are present, the iodine solution will change from a brown colour to a black colour.

Conclusion:
Bread reacted with iodine solution. Therefore bread contains complex sugars.

Testing for protiens

Aim: To test if a sample of food contains protein 

Equipment: 

• Test Tube 
• Sodium hydroxide (Naoh)
• Copper sulphate (CuSO4)
• Food sample

Method :

1. Place about 2 ml of the sample into a test tube and ad 5 drops of sodium hydroxide

2. Add 5 drops of copper sulphate 

3. shake the test tube gently side to side 

Result If the solution remains blue then no protein is present. if the solution changes to a purple colour then protein is present