ninhydrin


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Related to ninhydrin: Ninhydrin test

nin·hy·drin

(nin-hī'drin),
A substance that Reacts with free amino acids to yield CO2, NH3, and an aldehyde, the NH3 further yielding a colored product (diketohydrindylidene-diketohydrindamine, a bi-indanedione derivative also called Ruhemann purple).
See also: ninhydrin reaction.

ninhydrin

An oxidising reagent that reacts with amino acids and proteins, which is used to screen urine specimens for presence of, and semiquantify, alpha-amino acids as the specimen changes colours.

ninhydrin

Triketohydrindene Clinical toxicology An oxidizing reagent that reacts with amino acids and proteins, used to screen urine specimens for presence of, and semiquantify, α-amino acids, as it changes colors

nin·hy·drin

(nin-hī'drin)
Triketohydrindene, an analytic reagent that reacts with free amino acids to yield CO2, NH3, and an aldehyde, the NH3 produced yielding a colored product.
See also: ninhydrin reaction
[Ger. trade name, fr. the chemical name]

ninhydrin

a reagent used to detect AMINO ACIDS by the blue colour produced (yellow with proline). The quantity of the amino acid is proportional to the ABSORBANCE of the solution after reaction with ninhydrin. The technique can be used to detect amino acids on chromatograms, for example (see CHROMATOGRAPHY).
References in periodicals archive ?
In our system, such a metabolite would both possess a tryptophan-like chromatographic affinity and react with ninhydrin.
A wide range of sample types can be run and thanks to the online post-column derivatization of the amino acids with Ninhydrin, the precision on peak area is better than 1.
The Latent Print Section is very successful at recovering and analyzing prints from a variety of porous and nonporous evidence using items such as 1,8-diazafluoren-9-one (DFO), ninhydrin, physical developer, superglue, powder, Reflected Ultraviolet Imaging Systems, and dye stain lasers.
They determined the degree of hydrolysis using ninhydrin (triketohydrindane hydrate), a chemical used to detect ammonia or primary amines.
Highest: NINE HUNDRED NINETY NINE THOUSAND NINE HUNDRED to UNTHINNED NINHYDRIN UREDINEAE SHUNNED TENDON.
The reagent ninhydrin is applied and the resulting reaction turns the primary amino acids a bluish color and the secondary amino acids brownish-yellow.
In adults, the ninhydrin (sweat) test is used to indicate a nerve lesion by whether or not sweat is detected by a starch and salt solvent.
A standard fingerprint method for use on paper products was (and still is) ninhydrin, a biological stain which reacts with protein in the fingerprint residue and produces a magenta-coloured fingerprint.
Other good sections explore methods for recovering latent fingerprints, such as iodine fuming and the ninhydrin technique, and detecting firearm evidence.
A ninhydrin method for amino acid detection was used, dried sample hydrolysates were dissolved in 2 ml of citrate buffer at pH 4.
Plasma free amino acids were quantified using a S433 amino acid analyzer (Sykam, Gilching, Germany) using the ninhydrin method.