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Biochemical FoodTest

Aslevel Biochemistry AQA Specification

NutrientReagent UsedHow Test is carried outPositive Result
Reducing Sugars Benedict's Solution Add Benedict's solution to sample in a test-tube. Heat in a water-bath. Orange-Red
Non-Reducing Sugar Hydrochloric acid, and Benedict's solution Boil sample with dilute acid. Add sodium hydrogencarbonate to neutralise. Carry out reducing sugar test. Orange-Red
Starch iodine solution Add few drops of iodine solution to the sample Blue-Black staining
Lipid Ethanol Shake the sample with ethanol in a test-tube. Allow to settle. Pour clear liquid into water in another test-tube Cloudy-White emulsion
Protein Bieuret solution Add biuret solution to sample in a test-tube. Warm very gently Lila/mauve colour
Created by: axhleo