Do the same test as for reducing sugars, just to make sure that it is non-reducing.
Then with a different sample, add an equal amount of hydrochloric acid to the sample and heat for 5 minutes, which is to hydrolyse the disaccharide into its original monosaccharide units.
Then add sodium hydrocarbonate to the solution, to neutralize the acid
Then re-test it with Benedict's Reagent and heat it again- the solution should go orange-brown
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