date:Sep 07, 2012
of jaggery is taken in a test tube. About 3ml of alcohol is added to it and the test tube is shaken vigorously to mix the content. About ten drops of hydrochloric acid are added to it. A pink colour indicates the presence of metanil yellow (a non-permitted coal tar colour) in jaggery.
Sugar solution
A drop of honey is added to a glass of water. If it does not disperse in the water, the honey is pure; but if it does, it indicates the presence of added sugar.
Bura sugar
About 1ml of HCl is adde