XANTHOPROTEIC TEST
Requirements Of Xanthoproteic Test
Instruments and Materials
Test tubes
Test tube stand
Pipettes
Dropper
Bunsen burner
Chemicals and Reagents
3 ml of test solution
40% of NaOH solution
1ml of conc. HNO3
Procedure Of Xanthoproteic Test
Take a dry and sterile test tube.
Add 2 ml of the given sample solution into the test tube with the help of dropper.
Add 1 ml of concentrated sulfuric acid (HNO3).
Boil the test solution gently on a Bunsen burner.
The solution turns yellow; then cool the test solution.
Add 2ml of 40% of NaOH solution till the solution turns alkaline.
Observe the change in color.
Observation And Inferences of Xanthoproteic Test
Formation of a deep yellow or orange color gives this test positive.