biochemical tests

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reducing sugar (glucose)

1cm solution

1cm benedicts solution

heat at 30 for 5 minutes

colour change from blue-> red (precipitate)

1 of 3

testing starch

1 drop solution

1 drop iodine solution

colour change from yellow/brown => blue/black

2 of 3

non-reducing sugars (only do on solutions that do

1cm solution

add 1cm hydrochloric acid

heat at 80 for 5 minutes]neutralise with sodium hydrogen carbonate

add 1cm benedicts solution

heat at 80 for 5 minutes

colour change blue => red (precipitate)

3 of 3

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