Nutrient Testing Lab
Purpose: Test different food items to see if certain nutrients are present.
Hypothesis: if iodine, paper or certain solutions is present in the foods we test then it has one of the nutrients because it is detectable by a black, blue, yellow color when they are applied.
Materials: flour, gelatin, milk, Iodine, brown bag, honey, cooking oil, potatoes, test tubes, peanut butter, eggs, paper towels, Chem-plate, hot water bath, Biuret's solution, Benedict's solution, chocolate syrup, apple, bread, butter, salad dressing.
Test for Starch (1. Place a small quantity of the food in one space of the chemical plate. (2. Put 1-2 drops of iodine in the food. (3. Look to see if the iodine is black.
Test for Sugar (4. Put 30 drops of food-water in the test tube. (5. Add Benedict's solution until the test tube is one-third full. (6. Put the test tube in the hot water 7. Take out the test tube look to see whether the solution turned green, yellow, or orange. …show more content…
Fill the test tube about one-third full of food solution. (9. Add 10 drops of Biuret's solution. (10. Hold the test tube against a white background. Note whether the mixture has turned a violet color. This indicates the presence of protein.
Test for Lipids (fats, oils, or waxes) (11. Place a few drops of food in a piece of brown paper bag. Place a few drops of water on another section of brown paper. (12. Hold the paper up to the light and look at the water and food spot. Note whether the spot is greasy and translucent. This indicates the presence of a fat. (13. Reexamine the spots after a few
Purpose: Test different food items to see if certain nutrients are present.
Hypothesis: if iodine, paper or certain solutions is present in the foods we test then it has one of the nutrients because it is detectable by a black, blue, yellow color when they are applied.
Materials: flour, gelatin, milk, Iodine, brown bag, honey, cooking oil, potatoes, test tubes, peanut butter, eggs, paper towels, Chem-plate, hot water bath, Biuret's solution, Benedict's solution, chocolate syrup, apple, bread, butter, salad dressing.
Test for Starch (1. Place a small quantity of the food in one space of the chemical plate. (2. Put 1-2 drops of iodine in the food. (3. Look to see if the iodine is black.
Test for Sugar (4. Put 30 drops of food-water in the test tube. (5. Add Benedict's solution until the test tube is one-third full. (6. Put the test tube in the hot water 7. Take out the test tube look to see whether the solution turned green, yellow, or orange. …show more content…
Fill the test tube about one-third full of food solution. (9. Add 10 drops of Biuret's solution. (10. Hold the test tube against a white background. Note whether the mixture has turned a violet color. This indicates the presence of protein.
Test for Lipids (fats, oils, or waxes) (11. Place a few drops of food in a piece of brown paper bag. Place a few drops of water on another section of brown paper. (12. Hold the paper up to the light and look at the water and food spot. Note whether the spot is greasy and translucent. This indicates the presence of a fat. (13. Reexamine the spots after a few