jan 1, 1937 - invention of luminol as a test for blood

Description:

used in crime scenes that may have been cleaned up or crimes that may have amounts of blood too little to see with an unaided eye. Luminol creates a luminescent reaction in oxidizing agents such as blood, catalyzes the oxidation of luminol by hydrogen peroxide in a basic solution. Since it isn't specific to blood a follow up presumptive test such as phenolphthalein is typically ran on potential samples prior to collection.

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