TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY
Editorial use only.
Biuret test for proteins. The Biuret reagent contains copper(II) sulfate (CuSO4) and sodium hydroxide (NaOH), with potassium sodium tartrate (KNaC4H4O6) added to stabilize copper ions. Here blue-coloured Biuret reagent was added to a solution of albumin (egg white) in a beaker. The solution turned violet (deep purple), indicating presence of proteins.
Model release not required. Property release not available.