Determination of trace aluminum in natural waters by ion exchanger fluorometry Capitán García, Fermín Manzano Moreno, Eloísa Vílchez Quero, José Luis Capitán Vallvey, Luis Fermín Ion-exchanger fluorometry Aluminum determination Natural waters Morin (2′, 3, 4′, 5, 7-pentahydroxyflavone) has been used as a ligand in the fluorometric microdetermination of aluminum at the sub-μgl-1 level. A method has been developed which is based on ion exchanger fluorometry (IEF). The 1:1 aluminum-morin complex is fixed on a dextran-type cationic exchanger, and the fluorescence of the gel, packed on a 1-mm quartz cell, is measured directly using a solid-surface attachment. The concentration for the method ranges between 0.4 and 1.6μgl-1, although this can be diminished by increasing the sample volume. The method has been successfully applied to the determination of aluminum in natural water and offers several advantages in comparison with solution methods. 2014-07-01T11:38:26Z 2014-07-01T11:38:26Z 1989 journal article Capitan, F.; et al. Determination of trace aluminum in natural waters by ion exchanger fluorometry. Analytical Sciences, 5(5): 549-555 (1989). [http://hdl.handle.net/10481/32428] 0910-6340 1348-2246 http://hdl.handle.net/10481/32428 10.2116/analsci.5.549 eng open access Japan Society for Analytical Chemistry (JSAC)