BIo food tests Flashcards
learn (17 cards)
what is the test for starch?
iodine soloution
what is starch?
carbohydrate
what is the colour change for iodine solution in the presence of starch?
brown to blue black
Test for reducing sugars?
Benedicts test
what colour does blue indicate using the Benedict’s test?
none
what colour does green indicate using the Benedict’s test?
trace
what colour does yellow indicate using the Benedict’s test?
low
what colour does orange indicate using the Benedict’s test?
moderate
what colour does red indicate using the Benedict’s test?
high
process of using the Benedict’s test?
add a few drops Benedict’s solution to the mixture and heat in a water bath over a bunsen burner for 5 min
test for proteins?
BIURET TEST.
biuret test colour change
blue - purple
test for lipids?
emulsion test
process for emulsion test
add ethanol agitate test tube then add to distilled water
positive result for emulation test?
white cloudy parcipate floating on top
test for vitamin c?
DCPIP test
DICPIP test colour change
blue-yellow
