Food Tests Flashcards
What do you use to test for STARCH?
Iodine
What do you use to test for GLUCOSE?
Benedict’s solution
What do you use to test for PROTEIN?
Biuret solution (copper sulphate + sodium hydroxide)
What do you use to test for FAT?
Ethanol
Colour change for STARCH…
FROM - orange
TO - blue/black
Colour change for GLUCOSE…
FROM - blue
TO - green, yellow, orange, red
Colour change for PROTEIN…
FROM - blue
TO - lilac
Colour change for FAT…
FROM - no emulsion
TO - white emulsion
How do you test for GLUCOSE?
1) dissolve in water
2) add Benedict’s solution
3) heat for 5 minutes in a water bath
How do you test for PROTEIN?
1) dissolve in water
2) add (equal amounts of) biuret solution
How do you test for FAT?
1) add ethanol until dissolved
2) transfer ethanol and food mixture into water
How do you test for STARCH?
1) dissolve in water
2) add iodine
Food that contains STARCH…
Bread
Rice
Pasta
Food that contains GLUCOSE…
Biscuits
Chocolate
Fruit
Food that contains PROTEIN…
Milk
Meat
Egg
