Picric acid: its extraction purification from dinitrophenols and analytical applications
https://doi.org/10.29235/1561-8331-2019-55-1-46-52
Abstract
A procedure of extraction purification of picric acid from impurities of dinitrophenols with diethyl ether at pH = 3 has been developed. Purified picric acid was used to determine the creatinine by the Jaffe reaction on model systems and the extraction-photometric determination of the basic substance in higher quaternary ammonium (QAS) and amine impurities in them. It was shown that both the purity and the concentration of picric acid affect the sensitivity of the creatinine quantification. It was found that to determine creatinine, a solution of HPic with a concentration of 0,035 mol/l should be used. The determination of amines in the QAS and basic substance is also necessary to be carried out only with purified picric acid to avoid distortion of the results.
About the Authors
Yu. V. Matveichuk
Belarusian State University
Belarus
Belarus
Yulya V. Matveichuk – Ph. D. (Сhemistry), Associate Professor.
14, Leningradskaya Str., 220030, Minsk.
E. M. Rakhman’ko
Belarusian State University
Belarus
Belarus
Evgenii M. Rakhman’ ko – D. Sc. (Сhemistry), Professor.
14, Leningradskaya Str., 220030.
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