Non-reducing sugars

• give an example of a non-reducing sugar

  sucrose
• what should u do if a negative results was found initially with the Benedict's + boil test

  • add HCL acid to test sample + boil
  • it'll hydrolyse any glycosidic bonds present
  • add hydrogen carbonate powder (alkali) to neutralise
  • add Benedict's reagent + boil
• why do u add HCL acid to test sample

  to hydrolyse any glycosidic bonds present
• why do u add hydrogen carbonate powder

  to neutralise as it's an alkali
• describe a positive result

  • light blue -> brick red/orange
  • shows sucrose was in original test solution
• describe negative result

  • no colour change
  • shows no reducing or non-reducing sugars are present