Fractionation of aluminum in natural waters by fluorometry based on the competitive complexation

Spectrofluorimetric determination of aluminium using 2‐hydroxy‐1‐naphthylidene‐(8‐aminoquinoline)

“…Hence the optimum pH for this study was maintained at 5.5 for the acetate buffer solution. Similar results were previously reported by Lian (40) and Al‐Kindy (25) for complex formation between aluminium and 8‐hydroxyquinoline‐5‐sulfonic acid and aluminium and 8‐hydroxy‐7‐(4‐sulfo‐1‐naphthylazo)‐5‐quinoline, respectively, where optimum pH values were 5.5 and 5.6 (25,40). The fluorescence emission of the ligand remained weak at all pHs.…”

Dissociation kinetics of Fe(III)– and Al(III)–natural organic matter complexes at pH 6.0 and 8.0 and 25°C

“…The resin method does, however, provide Fe(III)-organic dissociation kinetics results which are in reasonable agreement with those obtained by the CL method. The resin method is therefore considered an acceptable method for determining the dissociation kinetics of Al-organic complexes given that no reasonable CL method is available (Hawke and Powell, 1994;Simpson et al, 1998;Elkins and Nelson, 2002;Lian et al, 2004). The level of accuracy of the resin method is limited by the need to perform the dissociation experiments at very low metal concentrations that, for the case of aluminium, are close to the detection limit of the analytical method employed.…”

Colorimetric detection of aluminium ion based on conjugated polydiacetylene supramolecules

“…28 Aluminium ion is abundantly found in nature in mineral form, and it is well known that aluminium ion causes drinking water contamination, which has harmful effects on human health. 29 In recent times, several fluorometric [30][31][32] and potentiometric 33,34 aluminium ion selective sensors have been developed. However, these sensors have some limitations such as the need for additional fluorescence probes [30][31][32] or matrix membranes.…”

“…29 In recent times, several fluorometric [30][31][32] and potentiometric 33,34 aluminium ion selective sensors have been developed. However, these sensors have some limitations such as the need for additional fluorescence probes [30][31][32] or matrix membranes. 33,34 The motivation behind this work was to develop a PDAbased sensor system to detect aluminium ion in aqueous solution.…”