food tests Flashcards
1
Q
what is step 1
A
take food sample and grind to a paste in distilled water using a mortar and pestle. transfer the paste to a beaker and add more distilled water and stir.
2
Q
what is step 2
A
filter the solution to remove suspended food particles
3
Q
what is step 3
A
place 2cm cubed of food solution into a test tube
4
Q
how do we test for carbohydrates
A
iodine solution which will turn from orange to blue/black
5
Q
how do we test for proteins
A
buret which will turn blue to purple
6
Q
how do we test for lipids
A
add distilled water and ethanol and will turn cloudy white
7
Q
how do we test for sugars
A
add Benedict’s solution and place into a beaker filled with half full hot water and leave for 5 mins. should turn blue to red
