About Lesson
Reaction to test protein in lab
a) Biuret test:
- The formation of violet coloration confirms the presence of protein.
b) Xanthoproteic test:
c) Millon’s test:
- The phenolic group of tyrosine and protein react with mercuric sulfate in the presence of sodium nitrate and sulfuric acid to give a red color.
d) Ninhydrin test:
- The presence of violet color confirms the presence of protein