Spectral and fluorescent indication of the acid-base properties of biopolymer solutions

Описание

Тип публикации: статья из журнала

Год издания: 2011

Ключевые слова: fluorescence spectra, absorption spectra, quantum yield, fluorescence lifetime, protoliths, fluorescein, gelatin, starch, chitosan

Аннотация: Methods of absorption and fluorescent spectroscopy and fluorescent chronoscopy are used to investigate aqueous fluorescein solutions with pH values increasing from 1.79 to 11.67. For each method, the calibration curves are drawn for the fraction of dianion fluorescein species, quantum fluorescence yield, and amplitude dianion contrПоказать полностьюibution to the fluorescence intensity on the pH values of aqueous solutions. The calibration curves allow the pH values of aqueous fluorescein solutions with gelatin (pH = 6.4 +/- 0.1, 6.6 +/- 0.2, and 6.6 +/- 0.1), starch (pH = 6.3 +/- 0.1, 6.3 +/- 0.2, and 6.4 +/- 0.1), and acid-soluble chitosan additions (pH = 5.4 +/- 0.1, 5.6 +/- 02, and 5.8 +/- 0.1) to be estimated by these three methods. The pH values of biopolymer solutions obtained by the potentiometer method for starch (6.51) and gelatin (6.69) and by the three spectral and fluorescent methods are close; they are significantly underestimated (3.85) for chitosan solutions.

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Издание

Журнал: RUSSIAN PHYSICS JOURNAL

Выпуск журнала: Vol. 54, Is. 4

Номера страниц: 485-492

ISSN журнала: 10648887

Место издания: NEW YORK

Издатель: SPRINGER

Авторы

  • Slyusareva E.A. (Siberian Fed Univ, Krasnoyarsk, Russia)
  • Gerasimov M.A. (Siberian Fed Univ, Krasnoyarsk, Russia)
  • Sizykh A.G. (Siberian Fed Univ, Krasnoyarsk, Russia)
  • Gornostaev L.M. (VP Astafev Krasnoyarsk State Pedag Univ, Krasnoyarsk, Russia)

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