1. Testing for Organic Compounds

2. Lipids Paper bag or paper towel test
Add sample to a dry paper bag/towel
If lipids are present, a grease spot will remain when paper has dried
If lipids are absent, the paper will just be dry

3. Proteins Biuret test Add a few drops and swirl
If protein is present, sample will be lavender
If protein is absent, sample will remain light blue

4. Carbohydrates - Sugars
Benedict test
Add a few drops and heat for 5 minutes in water bath

5. Carbohydrates - Sugars
If sugar is present, sample will turn green, yellow, orange, or red
If sugar is absent, sample will remain aqua blue

6. Carbohydrates - Starches
Iodine test
Add a few drops and swirl
If starch is present, sample will turn dark blue or black
If starch is absent, sample will remain dark yellow or orange