Fluorimetric determination of aluminium and beryllium in mixtures by synchronous derivative spectrometry

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Abstract
Morin (2′,3,4′,5,7-pentahydroxyflavone) has been used as a ligand in the fluorimetric determination of beryllium and aluminium in binary mixtures. A synchronous derivative spectrofluorimetric method has been developed for the determination of beryllium and aluminium at ng ml–1 levels. The precision of the method, expressed as relative standard deviation, is better than 5%. This paper reports the testing of a graphical model used to measure derivative amplitudes. The method is based on the interference-free character of the isodifferential points in the derivative calibration graphs.

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