XANTHOPROTEIC TEST Meaning and
Definition
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The xanthoproteic test is a qualitative chemical test used in analytical chemistry to detect the presence of nitro compounds or proteins. The term "xanthoproteic" is derived from the Greek words "xanthos," meaning yellow, and "proteikos," meaning protein.
The test involves adding concentrated nitric acid (HNO3) to the substance being tested, followed by heating. If the substance contains a nitro compound, such as nitrobenzene or trinitrotoluene (TNT), a yellow coloration is observed. This color change occurs due to the formation of a nitrophenol compound when the nitric acid reacts with the aromatic ring of the nitro compound.
In the case of proteins, the xanthoproteic test is used to detect the presence of the amino acid tyrosine. When nitric acid is added to a protein and heated, it causes a yellow color to develop. This color change is due to the nitration of the phenolic group present in tyrosine, resulting in the formation of a yellow compound.
The xanthoproteic test is a simple and quick method to identify the presence of nitro compounds or proteins. It is often used in forensic analysis for the detection of explosives, as well as in biochemical experiments to determine the presence of tyrosine in proteins. However, it should be noted that the xanthoproteic test is not specific to tyrosine and can also give positive results with other phenolic compounds. Therefore, further confirmatory tests are required for accurate identification.
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A test for protein, by treating the substance with nitric acid; if protein is present a yellow color is produced (indicating the presence of xanthoprotein) which becomes more intense upon alkalinizing with ammonia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for XANTHOPROTEIC TEST
- zanthoproteic test
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Etymology of XANTHOPROTEIC TEST
The word "xanthoproteic test" has its roots in two distinct components:
1. "Xantho":
- Origin: Greek
- Etymology: Derived from the Greek word "xanthos", meaning "yellow".
- Meaning: "Xantho" is used in various scientific terms to indicate something yellow in color.
2. "Proteic":
- Origin: Greek
- Etymology: Derived from the Greek word "proteios", meaning "of the first quality" or "primary".
- Meaning: "Proteic" relates to proteins or refers to compounds containing proteins.
Combining these two components, the term "xanthoproteic" can be understood to mean a test or reaction that involves proteins and produces a yellow color. The xanthoproteic test is a chemical test used to detect the presence of proteins by producing a yellow color response.
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