Figure 2. The iodine test with chewing gum containing sugar (A) and without sugar (B). Left: just after chewing gums were added. Right: after 5 minutes

From

The Iodine Test for Reducing Sugars – A Safe, Quick and Easy Alternative to Copper(II) and Silver(I) Based Reagents

Holger Fleischer

World Journal of Chemical Education. 2019, 7(2), 45-52 doi:10.12691/wjce-7-2-3