Benedict's Test for Sugars
The Benedict's test is the standard GCSE method for identifying reducing sugars like glucose in food samples.
Why must you use a hot water bath rather than a direct flame?
What is Benedict's Test for Sugars?
"Benedict's test is a chemical test for the presence of reducing sugars which requires heating."
What colour change shows starch is present when iodine solution is added?
Which result would show protein is present?
A food sample gives a brick-red precipitate with Benedict’s solution after heating. What does this show?
Which observation is a positive result for the emulsion test for lipids?
Test Protocol
Add Benedict's solution and heat the sample in a water bath set to 80°C.
A range of colours from green to brick-red reflects the concentration of sugar present.
Make sure to use an excess of Benedict's solution to ensure all sugar reacts.
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