Food Tests Flashcards
What is the purpose of the Benedict’s Test?
The Benedict’s Test is used to test for the presence of glucose in food samples.
What color change indicates the presence of glucose in the Benedict’s Test?
blue to green or yellow in low concentrations of glucose, or brick-red in high concentrations.
What is the first step in performing the Benedict’s Test?
Prepare a food sample and transfer 5 cm³ to a test tube.
What temperature should the water bath be set to for the Benedict’s Test?
The water bath should be set to 75 °C.
What solution is used to test for starch?
Iodine solution is used to test for starch.
What color change indicates the presence of starch when using iodine solution?
The solution changes from browny-orange to black or blue-black.
What is the Biuret Test used for?
Proteins
What color change indicates the presence of protein in the Biuret Test?
The solution changes from blue to pink or purple
What is the Sudan III Test used for?
test for the presence of lipids in food samples.
What indicates the presence of lipids when using Sudan III stain solution?
If lipids are present, the mixture will separate into two layers, with the top layer being bright red.
What should you do before starting food tests?
Make sure to do a risk assessment before starting these tests.
Name the nutrient that provides energy.
Carbohydrates provide energy.
What are the key nutrients your body needs?
Your body needs carbohydrates, lipids, proteins, vitamins, mineral ions, water, and dietary fiber.
