Chemiluminescence of luminol Recently I have tried to perform an experiment with luminol and hydrogen peroxide (with potassium ferricyanide as the catalyst). Upon googling, I found two ways to conduct this experiment and was wondering which way is more suitable (because I have limited amounts of luminol and do not want to fail the experiment and waste luminol).

1st way: Preparing an alkaline stock solution of luminol and potassium ferricyanide and another stock solution consisting of hydrogen peroxide only.

2nd way: Preparing an alkaline stock solution of luminol  and another stock solution consisting of hydrogen peroxide and potassium ferricyanide.
Here they replace the ferricyanide for bleach, but the description does say that the luminol solution is stable in base for up to three weeks. So I would follow your 2nd way.