Scientific Report on the Tests of Substances in Food

Scientific Report on the Tests of Substances in Food

Aim: To observe different substances in different food items.

Hypothesis:

Starch may be present in potato

Protein may be present in mince, peanuts and fish.

Lipids may be present in mince and fish.

Glucose may be present in apple.

NaCl (sodium chloride) may be present in peanuts.

Materials:

• Brown paper (lipids)

• Benedict’s solution (Glucose)

• Lugol’s iodine solution (starch)

• Silver nitrate solution (NaCl)

• Biurret solution (Protein)

• Potato

• Celery

• Apple

• Peas

• Peanuts

• Fish

• Mince

• Test Tubes

• Hot Plate

• Water

• Beaker

• Plate (Ice-cream bucket lid)

• Knife

Risk Management:

Substance Risk Management

Glass Low Be careful while using glass and avoid breaking. If broken alert a teacher and people around you. Clean up and dispose of carefully.

Hot Plate Low Be careful while around hot plate and avoid contact. If you are burnt then place burn under running cold water.

Hot /Boiling Water Low Be careful while around hot water and avoid contact. If you are burnt then place burn under running cold water.

Peanuts (Allergies) Low/Moderate Be aware if anyone has allergies.

Chemicals Moderate Avoid contact to eyes, skin. If this does occur wash out the substance.

Avoid inhalation and ingestion. If this does occur get assistance and/or go the hospital.

Knife Low Be careful while using knife and be aware of what you are doing. If you are cut, stop the bleeding and seek assistance to clean out wound.

Method:

Lipids – The food products were rubbed with brown paper and left to see if they would dry and become transparent.

NaCl – 3 drops of silver nitrate solution was added onto the food products.

Glucose – The different food products were put into different test tubes with 3-4 drops of Benedict’s solution. The test tubes were then placed in a beaker filled with near boiling water on a hot plate. It was watched for approximately 5 minutes before any change.

Protein – 3-4 drops