Explain Procedure for Detection of Metanil Yellow?
Carry out the exercise following the steps enumerated herewith.
1. Suspend the food sample in water and shake vigorously.
2. Filter the sample and dilute it till it is almost colourless.
3. Add few drops of concentrated HCl to a small portion of diluted sample and observe for a colour change.
4. Magenta red colour is a positive test i.e. metanil yellow is present.