蘇丹三紅...測試蛋白質[詳細說明之]

Test for Protein - Biuret test
Procedure
(i) Add a few drops of dilute NaOH solution to 1cm3 of egg white solution.
(ii) Add dilute CuSo4 solution drop by drop with shaking all the time

Result:
The mixutre changes to violet colour when protein is present.
Negative Result for this test is a light blue colour.