Food tests Learning objectives Describe the tests for

Food tests Learning objectives: • Describe the tests for glucose and starch

Which is the food test for lipids? A Iodine B Benedict’s solution C Biuret solution D Ethanol and water

Which of the following is not blue? A Iodine B Benedict’s solution C Biuret solution D A smurf

Which food test requires heat? A Starch B Reducing sugars C Protein D Fat

Which are used to test for carbohydrates? A Iodine B Benedict’s solution C Biuret solution D Ethanol and water

8 A What’s in food? This potato contains… Food sample Test Result Iodine solution blue-black Benedict’s test blue Biuret test blue Ethanol test clear A Starch B Reducing sugars C Protein D Fat

8 A What’s in food? Food substance X contains? Food sample X Test Result Iodine solution orangey-brown Benedict’s test orangey-red Biuret test blue Ethanol test clear A Starch B Reducing sugars C Protein D Fat

8 A What’s in food? Food substance A contains? Food sample A Test Result Iodine solution orangey-brown Benedict’s test orangey-red Biuret test purple Ethanol test cloudy A All of them B Reducing sugars and protein C Reducing sugars, protein & fat D Starch, protein & fat

Food tests YOU ARE NOT ALLOWED TO USE NOTES FOR THIS PRACTICAL Task 1: Using your knowledge of food tests, complete all four tests on various samples of food. Write conclusions for each food sample. Aim to complete a minimum of 4 food samples.

Food tests Task 2: watch food tests video clip to recap on the methods to test for starch, glucose, protein and lipids.

Thumbs up or down Learning objectives: • Describe the tests for glucose and starch