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521-31-3 Luminol Blood Test,
C8H7N3O2 Luminol Blood Test,
CAS 521-31-3 luminol testing fluid
You must know this knowledge about luminol (luminol) testing blood!CAS 521-31-3;Molecular Formula:C8H7N3O2
Luminol, commonly known as luminol, the luminol reagent used in criminal investigations is a mixture of luminol and hydrogen peroxide. The blood contains iron. Iron will accelerate the oxidation process of luminol and hydrogen peroxide. During the reaction, the energy released by it will exist in the form of photons, which can continue to emit fluorescence for 30 seconds in the dark.
How sensitive is luminol to detect blood?
Luminol is very sensitive in detecting blood. Even a drop of blood can be detected if it is dropped into a large bathtub. The scene must be washed to a level that luminol cannot detect. Unless the test is not performed, as long as the test is not performed, it is basically non-existent. The possibility of not being detected.
How does forensic medicine perform luminol detection
Spray the luminol evenly on the surface of an object in a dark room, and a small amount of active oxidant will make the luminol emit visible blue light. This glow only lasts about 30 minutes, but investigators can record this effect with long-exposure photos. Crime scene investigators must spray luminol evenly to avoid misleading results, because traces of blood appear to be more concentrated in areas where more luminol has been sprayed. The luminescence intensity of luminol does not indicate the amount of blood or other activators present, but only the distribution of these substances in the area under investigation.
Dry or corrupt blood stains can make luminol glow more intensely
In 1937, German forensic scientist Specht conducted extensive research on detecting blood stains at crime scenes. In 1939, two American pathologists made three important observations on luminol: Although the luminol test is not deterministic, this test can quickly detect large areas with suspicious materials; compared with fresh blood, Dry blood stains or corrupt blood stains can make luminol glow more intensely; if the luminescence disappears, you can rebuild the luminescence by using a fresh luminol-hydrogen peroxide solution, so that the dried blood stains can glow repeatedly.
Disadvantages of luminol (luminol) testing blood
Some shortcomings of luminol limit its usefulness in crime scene investigations. In addition to blood, other substances (such as copper and copper-containing compounds) and optical bleaches also make luminol glow. Therefore, if someone cleans the crime scene with bleach, the bleach residue will cause the entire crime scene to glow blue, which will cover up the effective evidence at the scene
This is the end of the editor about the knowledge of luminol (luminol) reagents for blood detection. Desheng is a professional R&D and production of luminol reagents with excellent quality and reasonable price. For more information, please contact professional customer service.
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