- Use grasses or other outdoor plants for chromatography.
- Set up numbered bank of tubes (0-10) using serial dilutions of DPIP if Spec 20 is not available. Students then match their tubes to color standards in tube bank.
- Place spinach in light prior to experiment to activate photosystems.
- Mix DPIP immediately prior to lab.
- Borrow Spec 20's from other school or local college.
Borrowing equipment for classroom biology science fair projects is a great way to save money.