Reducing sugars (eg glucose)

• describe the test for reducing sugars

  • to test tube add Benedict's reagent + test sample
  • boil in a water bath
• what occurs if there is a positive result

  • light blue Benedict's reagent -> brick red upon heating
• what occurs if there is a negative result

  • light blue Benedict's reagent STAYS light blue upon heating
• give examples of reducing sugars

  • glucose
  • galactose
  • fructose
  • maltose
  • lactose
• give an example of a non-reducing sugar

  sucrose
• what other colours can the reagent turn

  • green
  • yellow
  • orange
  • brick red
  • the more concentrated the reducing sugar ->the more brick-red it will be
• what can u describe the results from the reducing sugars test

  semi-quantitative