ninhydrin


Also found in: Dictionary, Encyclopedia, Wikipedia.
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 ?
* Ninhydrin, which reacts with amino acids in perspiration to make it an effective reagent for developing latent fingerprints, provides no useful results for lip prints, since there are no sweat glands in the lips.
The simplest, ninhydrin, is rapid and inexpensive but less sensitive than is ideal because it involves a visual comparison.
Ninhydrin 5 g Methanol 30 mL Isopropanol 40 mL Petroleum ether 930 mL The ninhydrin crystals are first dissolved in methanol on a stirring device.
Keywords: Amikacin sulphate, Colorimetric detection, Derivatization, Ninhydrin reagent, Validation.
Stein, "A modified ninhydrin reagent for the photometric determination of amino acids and related compounds," The Journal of Biological Chemistry, vol.
The objectives of this study were to determine the feasibility of measuring amino acid exosmosis by ninhydrin as a test for high temperature injury to wheat and evaluate the suitability of the method for use on maturing plants.
Physical developer is normally applied after the DFO and/or ninhydrin methods.
Test for proteins: Crude extract reacts with ninhydrin reagent; appearances of blue colour indicated the presence of amino acid and proteins (Yadav and Agarwala, 2011).
Ninhydrin. Usage: revealed fingerprint; state: liquid; material jar: metal.,polysorbate 80.
The resin was eluted with 2.0 mol/l of ammonium hydroxide solution, followed by analysis of ARG by ninhydrin solution [9].
Proline concentrations in naked oats leaves were measured by the sulfosalicylic acid-acid ninhydrin method with slight modifications [8].