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Fluorometric determination of tin(IV) with 3-hydroxychromone

Fluorometrische Bestimmung von Zinn(IV) mit 3-Hydroxychromon

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Summary

3-Hydroxychromone reacts with tin(IV) to produce 1∶1 complex in a weakly acidic-neutral medium. The complex exhibits intense fluorescence. A sensitive method is described for the fluorometric determination of tin(IV) with 3-hydroxychromone. The calibration graph is linear in the range of 0.4–8.0μg/25 ml of tin(IV) (pH 4.5–5.0, Excitation wavelength: 365 nm, Measured total fluorescence). Chloride which generally decreases the fluorescence intensity in the fluorometric determination of tin can be tolerated at 300-mg level.

Zusammenfassung

3-Hydroxychromon reagiert mit Zinn(IV) in schwach saurem bis neutralem Medium unter Bildung eines 1∶1-Komplexes. Dieser fluoresziert intensiv. Ein empfindliches Verfahren zur Bestimmung von Sn(IV) auf dieser Grundlage wurde ausgearbeitet. Die Eichkurve verläuft in dem Gebiet zwischen 0,4 und 8,0μg Sn/25 ml bei pH 4,5, einer Wellenlänge von 365 nm und bei Messung der Gesamtfluoreszenz geradlinig. Chloride, die die Fluoreszenzintensität bei Zinnbestimmungen im allgemeinen herabsetzen, können bis zu 300 mg toleriert werden.

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Nakamura, M., Murata, A. Fluorometric determination of tin(IV) with 3-hydroxychromone. Mikrochim Acta 73, 301–306 (1980). https://doi.org/10.1007/BF01196152

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  • DOI: https://doi.org/10.1007/BF01196152

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