Who invented luminol?

Who invented luminol?

Walter Specht History. In 1937, the German chemist and criminologist Walter Specht (de) tested a mixture using as a reagent the luminol on various supports stained with blood (lawn, bricks, rusty iron, stone slabs, furniture) and reveals hemoglobin through photography.

Where can I find luminol?

Luminol Spray, 2g: Amazon.co.uk: Health & Personal Care

How Does Chemistry Help With Forensic Blood Detection?

Use in forensic science The investigator prepares a solution of luminol and activator and sprays it over the entire surface of the investigation site. The iron present in blood will then catalyze the chemical reaction that causes luminescence, revealing the location of the blood.

Who invented the Bluestar?

Created in 2003 by Loïc Blum, researcher at the CNRS, the Bluestar quickly became a staple of the technical and scientific police services (PTS), replacing Luminol. “The reaction of Bluestar is much more intense and longer,” assures Jean-Marc Lefebvre-Despeaux.

How do you know if it’s a blood stain?

Highlight spots of blood

1. hydrogen peroxide alone is a means of highlighting the presence of blood. …
2. luminol (3-aminophthalhydrazide of formula C8H7N3O2) is a molecule which has the particularity of emitting luminescence (photons) in the presence of an activator (hydrogen peroxide).

What is the interest of chemistry in forensic science?

The chemistry is very important in the examinations, tests and analyzes involved in forensic laboratories. The development of chemical techniques to fight against all cases of crime is the search result in chemistrybut also creator of specific research in forensic science.

How to use luminol?

Biologists use the luminol especially to detect copper, iron, and cyanide. In forensic science, the luminol is used to detect faint traces of blood left at crime scenes thanks to the iron ions it contains.

Who invented the Blue Star?

Loïc Blum Created in 2003 by Loïc Blum, researcher at the CNRS, the Bluestar quickly became a staple of the technical and scientific police services (PTS), replacing Luminol. “The reaction of Bluestar is much more intense and longer,” assures Jean-Marc Lefebvre-Despeaux.

How to detect traces of blood?

Highlight blood spots

1. hydrogen peroxide alone is a means of highlighting the presence of blood. …
2. luminol (3-aminophthalhydrazide of formula C8H7N3O2) is a molecule which has the particularity of emitting luminescence (photons) in the presence of an activator (hydrogen peroxide).

What training to work in the scientific police?

For becoming an engineer of the scientific policeit is absolutely necessary to hold an engineering degree of Bac +5 level, obtained at a university or an engineering school (ENSAM, ENSA, Centrale, les Mines, etc.)

Why forensic identification?

to the law governing the identification judicial, it ensures the integrity and security of seized evidence and file information; it acts as a center of expertise for vehicle identification; it acts as a police pound for the vehicles.

How to become a forensic officer?

The recruitment of an ASPTS is done by competition. There are two competitions, an internal competition, reserved for civil servants and officers non-tenured, and an external competition, intended for people outside the public service. You can take the exams as many times as you want.

How to become a forensic science technician?

Hold a baccalaureate, pass the technician of police technique and scientist then follow a training remunerated in a structure of police national.

What is a forensic investigation?

information judiciary is I’survey conducted by an investigating judge to determine the existence of an offence: Act prohibited by law and punishable by criminal penalties, the perpetrators of the offense and if there are clues against the person or persons placed in question.

What is Luminol?

The investigator having detected traces of blood invisible by this type of projectors uses luminol in addition, this process of luminescence allowing, by the photograph of the scene, the morphoanalysis of the traces of blood, which determines the scenario of the crime – nature of the weapon, number of shots, … – and its chronology.

What is the composition of luminol?

Luminol can be synthesized from 3-nitrophthalic acid. Hydrazine (N 2 H 4) is first heated with 3-nitrophthalic acid in a high boiling point solvent such as triethylene glycol.

What is the difference between luminol and hydrogen peroxide?

The solution is yellow due to the presence of potassium ferricyanide. When luminol is mixed with hydrogen peroxide, there is no coloring of the solution (the 2 being colorless), there is no luminescence, nor gas evolution. On the other hand, when iron is mixed with hydrogen peroxide,…

What is Hemoglobin and Luminol Blend?

If the hemoglobin and the luminol mixture come into contact, the iron in the hemoglobin accelerates a reaction between the hydrogen peroxide and the luminol. In this oxidation reaction, luminol loses nitrogen and hydrogen atoms and gains oxygen atoms, resulting in a compound called 3-aminophthalate.