Biuret REAGENT according to Gornall et al. (1949)

1. Weigh 1.50 g of cupric sulfate pentahydrate (CuSO4 5 H2O) with 6.0 g sodium potassium tartrate tetrahydrate (NaKC4H4O6 4 H2O).

2. Dissolve in 500 ml of H2O.

3. Add 300 ml of 10% NaOH.

4. Make up to total volume of 1 liter. Store in a plastic bottle protected from light.



Gornall, A.G., Bardawill, C. J. and David, M. M. (1949)

Determination of Serum Proteins by means of the Biuret Reaction.

J. Biol. Chem. 177; 751.