Food Tests Flashcards
What test is used to test for reducing sugars?
Benedict’s reagent
What are the colour changes if reducing sugars are present?
Green to yellow to organs to brown to brick red depending on quantity of reducing sugar
What is used to test for non-reducing sugars
Hydrochloric acid
What colour change if there is non-reducing sugars?
Green to yellow to orange to brown to brick red depending on the quantity
What test is used to test for proteins?
Biuret reagent
What colour would the change be if there was protein present?
Blue to purple
What test is used for starch?
Iodine
What colour change would occur if starch present?
Different colours for different starch
Yellow-brown to blue-black (amylase)
Red-purple (amylopectin)
What is used to test for lipids?
Sudan |||
What would the colour change be is lipids were present?
White-cloudy to orange/red layer forming at top
