2,4-dinitrophenylhydrazine


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2,4-dinitrophenylhydrazine

[¦tü ¦fȯr dī¦nī·trō‚fen·əl′hī·drə‚zēn]
(organic chemistry)
(NO2)2C6H3-NHNH2 A red, crystalline powder with a melting point of approximately 200°C; soluble in dilute inorganic acids; used as a reagent for determination of ketones and aldehydes.
References in periodicals archive ?
They carried out the project successfully by grafting 2,4-dinitrophenylhydrazine on alumina nanoparticles.
2,4-dinitrophenylhydrazine is an analogue of hydrazine and an important class of drugs.
Louis, MO)] Protein carbonyls (oxidation) were detected by derivatizing homogenates with 10 mM 2,4-dinitrophenylhydrazine before electrophoresis.
It is well known that for a complete flavonoid content evaluation, two complementary colorimetric methods is required, within four major groups of flavonoids (flavones, flavonols, flavanones and isoflavones) only flavones and flavonols were found to complex stably with aluminum chloride, while flavanones and flavanonols reacted better with 2,4-dinitrophenylhydrazine [6].
Following extraction, vitamin C concentration in the fermented products is quantified spectrophotometrically by the 2,4-dinitrophenylhydrazine method.
Plasma protein carbonyls--The content of protein bound carbonyls in plasma, an indicator of protein oxidation, was measured at 380 nm using 2,4-dinitrophenylhydrazine by the method of Levine et al (17).
This method can be used to assess the concentrations of oxidative stress via the increase in the formation of protein-bound carbonyls, which are measured based on the covalent reaction of the carbonylated protein side chains with 2,4-dinitrophenylhydrazine followed by detection with a specific antidinitrophenyl antibody (21).
Formaldehyde was analyzed as follows (18): A cartridge containing 2,4-dinitrophenylhydrazine (DNPH), which forms a derivative with formaldehyde, was connected to chamber outlets to measure the concentration of formaldehyde within the chamber.
Futhermore, volatiles of uncured pork and chicken, when passed through a 2,4-dinitrophenylhydrazine solution had a similar and a cured flavour note.
The determination of ascorbic acido in whole blood and urine through the 2,4-dinitrophenylhydrazine derivative of dehydroascorbic acid.
A controlled explosion of the chemical 2,4-dinitrophenylhydrazine, used by A-level chemistry students in experiments, was due to take place yesterday afternoon.

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