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TMB, luminol, phenolphthalein - forensic blood test

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TMB, luminol, phenolphthalein - forensic blood test

Blood test is one of the most common forensic physical evidence tests in criminal cases. Blood chromogenic agent is used to quickly detect potential blood stains, blood fingerprints, blood fingerprints, etc. at the scene of the crime, which can provide important clues and basis for quickly restoring the scene of the crime and case investigation. TMB, luminol and phenolphthalein are common blood stain color reagents. They are the right assistants of forensic examination and evidence collection.


The full name of TMB is 3,3 ', 5,5' - tetramethylbenzidine, cas54827-17-7. TMB is a new and safe chromogen reagent, which is widely used in clinical laboratory, criminal detection and other fields.


TMB development method is a commonly used blood test method. Its principle is that the blood contains catalase and hematoporphyrin, which can catalyze hydrogen peroxide to release primary oxygen. Primary oxygen reacts with tetramethylbenzidine (TMB) to produce tetramethylbenzidine blue, which makes the blood appear turquoise blue.


Luminol, also known as luminol, cas521-31-3. Luminol can react with a variety of oxidants, which has high quantum yield and good water solubility.


Luminol luminescence method is a very common blood test method, its principle is that blood contains hemoglobin, hemoglobin contains iron, and iron can catalyze the decomposition of hydrogen peroxide into water and monooxygen, monooxygen can oxidize luminol, showing blue-green fluorescence.


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Luminol luminescence method is extremely sensitive. Even if the criminal has cleaned up the blood on the scene, forensic and other criminal investigators can still rely on luminol to make the blood invisible. Luminol luminescent method to restore blood is also the most common and exciting scene in criminal investigation movies and TV series.


Phenolphthalein, CAS 77-09-8. Phenolphthalein is a kind of weak organic acid, which is colorless in acidic and neutral solutions, purplish red in alkaline solutions, orange in very strong acidic solutions and colorless in very strong alkaline solutions. Human blood is alkaline, so phenolphthalein can appear red when it meets with blood.


Chemical reagent coloration is a common method of blood test in the field of criminal investigation. TMB, luminol, phenolphthalein and other chemical reagents are useful weapons to find the clues of cases, and become the right assistants of forensic staff. Desheng is an old manufacturer of chemiluminescence reagents. Besides the above TMB and luminol luminescent substrates, Desheng can also provide isoluminol and six acridine esters. Welcome to order!

Pub Time : 2021-02-24 20:20:40 >> News list
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