Abstract
(4-Nitrophenyl)diazonium tetrafluoroborate (4-NPD) has been proposed as the reagent for the spectrophotometric determination of flavonoids. 4-NPD has been demonstrated to undergo diazotization reaction with quercitin, naringenin, chrysin, morin, rutin, and naringin in an alkaline medium leading to the formation of yellow-orange products. The conditions of the spectrophotometric reaction have been optimized. A procedure for the spectrophotometric determination of flavonoids with the detection limits (1.5–3.9) × 10−7 M (0.05–0.16 μg/ml) has been developed. Quercitin has been determined in pharmaceutical preparations.
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Original Russian Text © V.A. Kudrinskaya, S.G. Dmitrienko, Yu.A. Zolotov, 2010, published in Vestnik Moskovskogo Universiteta. Khimiya, 2010, No. 4, pp. 296–301.
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Kudrinskaya, V.A., Dmitrienko, S.G. & Zolotov, Y.A. Spectrophotometric determination of flavonoids using their diazotization with (4-nitrophenyl)diazonium tetrafluoroborate. Moscow Univ. Chem. Bull. 65, 244–248 (2010). https://doi.org/10.3103/S0027131410040073
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DOI: https://doi.org/10.3103/S0027131410040073