Food Tests Flashcards
1
Q
Starch
A
Iodine solution —>
Blue/black if starch is present
Brown if starch is absent
2
Q
Maltose and glucose
A
Benedicts solutions - add a few drops and then heat in water bath
Red/orange/yellow/green if either of the sugars is present
Blue if neither of the sugars is present
3
Q
Fat - ethanol emulsion test
A
Ethanol - a dried sample of the substance to be tested is mixed with the ethanol which is then poured into a test tube of water
Water is cloudy if present
Clear if absent
4
Q
Proteins - the biuret test
A
Solutions 1 and 2
Add equal volumes of solution 1 and solution 2 to a solution of the substance to be tested
Purple is protein is present
Blue if it is absent
