Isodifferential derivative synchronous fluorimetric approach for the determination of gallium and aluminium in mixtures

This study was designed to test the feasibility of determining two substances in a mixture, when each has nearly the same spectral shape, by taking advantage of the special interference free character of the isodifferential point in the first derivative calibration graph. The research reported here...

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Bibliographic Details
Published in:Spectrochimica acta. Part A: Molecular spectroscopy 1987, Vol.43 (1), p.101-106
Main Authors: GARCIA SANCHEZ, F, HERNANDEZ LOPEZ, M, MARQUEZ GOMEZ, J. C
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
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Summary:This study was designed to test the feasibility of determining two substances in a mixture, when each has nearly the same spectral shape, by taking advantage of the special interference free character of the isodifferential point in the first derivative calibration graph. The research reported here describes a method of measuring derivative amplitudes in binary mixtures with superimposed spectral shapes. The fundamental theoretical aspects of the methodology are discussed. Aluminium and gallium oxinates, which have nearly the same broad, structureless, fluorescence spectra in a water—ethanol medium (40:60) (v/v) at pH 6.60, have been analysed with moderate success by applying synchronous derivative fluorimetry.
ISSN:0584-8539
DOI:10.1016/0584-8539(87)80205-2