ninhydrin

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Related to triketohydrindene: triketohydrindene hydrate

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.
Farlex Partner Medical Dictionary © Farlex 2012

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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005