Food Tests Flashcards
Reducing Sugars
Benedicts Test
Benedicts Test
Grind sample in water
Addbenedicts reagent
Heat mixture
Results of beneditcs res
Blue - IS a reducing sugar
Brick Red - NOT a reducing sugar
Non Reducing Sugars
modified benedicts test
Modified benedicts test
Add dilute HCl Heat Add sodium hydrogen carbonate (until fizzing stops) Add benedicts reagent Heat again
Results of modified benedicts test
Blue - NOT a non reducuing sugar
Brick Red - Is a non redcung sugar
Starch
Iodine in potassium iodide
Results of K on KI
Yellow - starch is NOT presnet
Blue/Black - startch IS present
Lipids
Emulsion test
Emulsion Test
Add ethanol
Shake
Add water
Shake
Ethanol is highly flamable
Ethanol is highly flamable
Results for Emulsion tets
Clear - NO lipid
Cloudy White Emulsion - IS a lipid
Proteins
Biuret Test
Biuret Test
Add sodium hydroxide
Add dilute copper sulphate
Mix
Results of Biuret test
Blue - NO proteins
Purple - IS a protein
