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Updated: Jun 28, 2026
Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
Published on: September 1, 2020
Fluorimetric determination traces of aluminium in soil extracts
M P Mánuel-Vez1, M García-Vargas
1Department of Analytical Chemistry, Faculty of Sciences, University of Cádiz, Cádiz, Spain.
Abstract:
Salicylaldehyde picolinoylhydrazone (SAPH) form a fluorescent complex with aluminium (lambda(ex) = 384 nm, lambda(em) = 468 nm) in acidic medium (stoichiometry 1:3, Al:SAPH). Two procedures based on the direct or standard additions methods has been proposed for the determination of concentrations down to 1-2 mug/dm(3) of Al(III). The effects of 72 ions in the method has been evaluated and different masking agent reactions have been tested. The method has been used satisfactorily for the determination of aluminium at a level of mug/dm(3) in acetate extracts of several agricultural soils. The method has been compared favourably with ICP spectroscopy emission.
