Hello,
1. To a test tube, add 40 drops of liquid to be tested.
2. If testing more than one liquid, label each test tube with a marker.
3. Add 3 drops of Biuret reagent solution to each test tube. Shake gently to mix.
4. Note any color change. Proteins will turn solution pink or purple.
*Source: my biology teacher. She gave us notes.*
Faith xoxo