SPECTROPHOTOMETRIC DETERMINATION OF 2-FURALDEHYDE USING 2,4-DINITROPHENILHYDRAZINE 

Volkova Natalija Valentinovna, Candidate of biological sciences, associate professor, head of sub-department of chemistry and theory and methodology of chemistry teaching, Penza State University (40 Krasnaya street, Penza, Russia), balikovan@mail.ru
Vernigora Alexander Nikolaevich, Candidate of biological sciences, associate professor, sub-department of chemistry and theory and methodology of chemistry teaching, Penza State University (40 Krasnaya street, Penza, Russia), vanvan7@yandex.ru
Frolov Anatoly Valerievich, Master degree student, Penza State University (40 Krasnaya street, Penza, Russia), ji-di96@yandex.ru

543.4/8

10.21685/2307-9150-2017-4-9

Background. Impurities of 2-furaldehyde may be present in polymeric materials, environmental objects, rectified alcohol, food products. In connection with the toxicity of aldehydes, an important task is to develop and improve methods for their quantification.
Materials and methods. The method of quantitative spectrophotometric determination based on the reaction of aldehydes with 2,4-dinitrophenilhydrazine with the formation of the corresponding hydrazones, which painted in wine-red color after adding alkali. The absorption spectra of solutions were recorded with a spectrophotometer Specord 40. The spectral data were processed using Microsoft Excel 2010.
Results. The authors have synthesized 2,4-dinitrophenylhydrazone 2-furaldehyde, selected a wavelength for spectrophotometric determination. The influence of interaction time of furfural and 2,4-dinitrophenilhydrazine before addition of the alcoholic alkali solution to the furfural hydrazone on the spectral characteristics of the studied solutions and their stability. The researchers have built calibration models to determine 2-furaldehyde and calculated their metrological characteristics.
Conclusions. The authors have picked conditions for the quantitative spectrophotometric determination of furfural with the use of 2,4-dinitrophenilhydrazine. The proposed method can be used for quantitative determination of 2-furaldehyde in ethanol solutions.

2-furaldehyde, 2,4-dinitrophenilhydrazine, spectrophotometry

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