carbohydrates Flashcards
1
Q
what solution is used
A
Iodine
2
Q
what are the steps to the test
A
add food to spotting tile
add few drops of iodine
see results
3
Q
what is the positive result of the starch test
A
Yellow brown to bluey black
4
Q
what causes the colour change
A
when food is dissolved in potassium iodide, the iodine forms a triiodide ion which slips into the amylose helix. causing colour change
