Luminol is used by forensic investigators to detect trace amounts of blood as it reacts with iron found in hemoglobin. With luminol sprayed evenly across area, trace amounts of an activating oxidant will cause the luminol to emit a blue glow that can be seen in a dark room. The glow lasts for about 30 seconds, but the effect can be documented by photograph. The intensity of the glow does not indicate the original amount present, but only the distribution of trace amounts left in the area.
How to Make a Forensic Crime Scene Kit. Create your own crime scene- teach how crime scenes are handled- give kits and let the kids try to solve the crime- aka someone stole Daddy's watch, Someone ate all the cookies, etc..
This is a really cool article about the chemicals used in crime scene investigations. Luminol solution is an important one, and is sprayed over a crime scene and produces a blue luminescence when it makes contact with blood. -Joey Sabelhaus