Testing for Proteins with Biuret Solution
Want to know if that piece of chicken or slice of cheese is actually packed with protein? The Biuret test is your go-to method, and it's dead simple to do.
Start by preparing your food sample and measuring 2cm³ into a test tube. Then add exactly 2cm³ of Biuret solution and give it a gentle shake to mix everything together.
Here's the magic bit: if protein is present, the solution changes from blue to purple. No protein? It stays blue. This colour change happens because the Biuret reagent reacts specifically with protein molecules.
Quick Tip: Meat, eggs, and dairy products like cheese are brilliant foods to test because they're naturally high in protein!
