Fluorimetric determination of aluminium in water by sequential injection through column extraction.
A fluorimetric procedure for the determination of aluminium with matrix removal in drinking water is proposed. The system is based both on the solid phase extraction of aluminium on a new chelating resin (XAD-4 modified by grafting salicylic acid) and the fluorimetric detection of a complex formed between 8-hydroxyquinoline-5-sulfonic acid (HQS) and Al(III), after elution of the resin by hydrochloric acid. The sorption and elution of aluminium were studied in both competitive and noncompetitive conditions, varying pH, flow-rates, volume and concentration of reagents, as well as time contact. The optimised procedure allows determination of Al3+ at the sub-ppb level (LOD: 0.2 microg L(-1) for 1 ml of sample) within a working range of 0.2-500 microg L(-1). The analytical procedure was successfully employed for the determination of aluminium in drinking water during and after flocculation/coagulation treatment processes.
Brach-Papa
C
C
Laboratoire de Chimie et Environnement, EA 2678, Université de Provence, 3 Place Victor Hugo, Case 29, 13331 Marseille, France.
Coulomb
B
B
Branger
C
C
Margaillan
A
A
Théraulaz
F
F
Van Loot
P
P
Boudenne
J L
JL