Flow-through analysis of Al in seawater by fluorometric detection with theuse of Lumogallion

A flow-through analytical method has been developed for the determination o f trace amounts of aluminum in seawater with the use of Lumogallion fluorom etric detection. Because iron was selectively removed by passing the sample through an 8-quinolinol immobilized chelating resin column (MAF-8HQ), this method could be applied to samples collected at the hydrothermal oceanic r egime. Several known organic complexing agents were studied as a model grou p to examine the effect of naturally occurring organic ligands on the detec tion of aluminum in seawater. The detection limit was 0.17 nM for 10 ml of sample. The standard deviation was 2.7% at 2 nM of aluminum. This method pe rmitted the sensitive, precise, and rapid determination of subnanomolar Al in seawater without contamination onboard ship. (C) 2000 John Wiley & Sons, Inc.