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Fluorimetric determination of Mg(II) traces with 1,8-dihydroxyanthraquinone

Fluorimetrische Bestimmung von Mg(II)-Spuren mit 1,8-Dikydroxyanthrachinon

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Summary

A fluorimetric method for the determination of Mg(II), based on the formation of a fluorescent 1∶1 chelate with 1,8-dihydroxyanthraquinone, is described. With 90% ethanol in ammoniacal medium, the fluorescent complex has excitation maxima at 470, 480 and 495 nm and emission maximum at 600 nm. The logarithm of apparent formation constant of the complex is 4.68. The calibration graph is linear over the range 5–350 ppb Mg(II).

Zusammenfassung

Die Methode beruht auf der Bildung eines fluoreszierenden 1∶1-Chelates von Mg(II) mit 1,8-Dihydroxyanthrachinon. In ammoniakalischem, 90% Ethanol enthaltendem Medium hat der fluoreszierende Komplex Anregungsmaxima bei 470, 480 und 495 nm und ein Emissionsmaximum bei 600 nm. Der Logarithmus der scheinbaren Bildungskonstante des Komplexes beträgt 4,68. Die Eichkurve verläuft zwischen 5 und 350 ppb Mg(II) linear.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Sciences, University of Extremadura, Badajoz, Spain

    M. Román Ceba, A. Fernández-Gutiérrez & M. C. Mahedero

Authors
  1. M. Román Ceba
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  2. A. Fernández-Gutiérrez
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  3. M. C. Mahedero
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Román Ceba, M., Fernández-Gutiérrez, A. & Mahedero, M.C. Fluorimetric determination of Mg(II) traces with 1,8-dihydroxyanthraquinone. Mikrochim Acta 80, 85–94 (1983). https://doi.org/10.1007/BF01204586

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  • DOI: https://doi.org/10.1007/BF01204586

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