Presumptive Tests for Blood: 11 Important Forensic Test Included

Presumptive Tests for Blood: 11 Important Forensic Test Included

Blood at the crime scene? The first question would be, “Is the suspected bloodstain is possibly the blood or not?” For that, an examiner has to perform one of the presumptive tests for blood on the field. Table of All Presumptive Test With Their Color Presumptive Test For Blood Reagent Color Adler Test (Benzidine Test) …

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Orthotolidine Test (Kohn & O’Kelly test): Principle, Reagent And Procedure

Orthotolidine Test (Kohn & O’Kelly test): Principle, Reagent And Procedure

Orthotolidine or O-tolidine test is one of the presumptive tests for blood detection by imparting blue (or yellow, in high acidic medium). The reaction is totally based on the activity of hydrogen peroxides with the heme component of blood. Moreover, the O-tolidine test was brought to be in practice as the replacement for the benzidine …

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Tetramethylbenzidine (TMB) Test: Principle, Reagent and Procedure

Tetramethylbenzidine (TMB) Test: Principle, Reagent and Procedure

Tetramethylbenzidine [TMB] test is a presumptive test, generally employed for the detection of blood based on reagent action of peroxide with heme to impart blue-green color. That’s the one-line answer. Let’s know about the TMB test. What is Tetramethylbenzidine (TMB) Test? Tetramethyl benzidine (TMB) is a tetramethyl derivative of benzidine that is used as a …

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Wagenaar Test: Procedure, Reagents, Forensic Importance, Pros, and Cons

Wagenaar Test: Procedure, Reagents, Forensic Importance, Pros, and Cons

Wagenaar is a crystal assay confirmatory test for blood that uses a mixed preparation of acetone and chloride ions to form acetone-chlor-hemin crystals. It was first developed in 1935 by M. Wagenaar. It is easy to perform and confirms whether the given fluid/stain is blood or not. Who Invented Wagenaar Test? It was developed by …

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Takayama Test For Blood: Principle, Reagent, Procedure, Advantages, and Disadvantages

Takayama Test For Blood: Principle, Reagent, Procedure, Advantages, and Disadvantages

Takayama test is one of the micro-crystal confirmatory tests for the blood that is frequently used in forensic laboratories. It is also called Hemochromogen test, and a positive result is indicated by the pink feathery crystals of pyridine-hemochromogen.  Who Developed the Takayama Test? It was first developed in 1912 by Masaeo Takayama, a Japanese forensic …

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