Preparing a Biuret solution Biuret reagent is a commonly used solution for detecting the presence of proteins in a sample. The biuret reagent can be made by adding NaOH to a solution of CuSO4 to make the solution alkaline. Dissolve 1.5 g of copper sulfate pentahydrate (CuSO4.5H2O) in 100 mL of distilled water. In a […]