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paper 1
Organisation
food tests
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GabyDC
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Cards (8)
what test is used to test for sugars:
Benedict's test
Once you add the
Benedict's solution
, you must heat it in a
water bath
for
5 minutes
at
75°C
what
test
is used to test for
starch
:
iodine
if
starch
is present the colour will change from
orange
to
black
what test is used to test for proteins:
biurets
solution
if
protein
is present the colour change is:
Blue
to
lilac
/
purple
what
reagent
is used to test for lipids:
Sudan III stain
Sudan III
test for
lipids
:
Place
5cm3
of your food sample in a test tube.
Add 3 drops of Sudan III stain solution.
Gently shake.
If a red layer separates out on top, then lipid was present.