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

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.