Flow Injection Extraction Spectrofluorimetric Determination of Aluminium as the Tetraphenylphosphonium Aluminium(iii) 8-Hydroxyquinoline-5-Sulphonate

A new analytical method was developed for on-line monitoring of residual coagulants (aluminium and iron salts) in potable water. The determination was based on a sequential procedure coupling an extraction/enrichment step of the analytes onto a modified resin and a spectrophotometric measurement of a surfactant-sensitized binary complex formed between eluted analytes and Chrome Azurol S. The optimization of the solid phase extraction was performed using factorial design and a Doehlert matrix considering six variables: sample percolation rate, sample metal concentration, flow-through sample volume (all three directly linked to the extraction step), elution flow rate, concentration and volume of eluent (all three directly linked to the elution step). A specific reagent was elaborated for sensitive and specific spectrophotometric determination of Al(III) and Fe(III), by optimizing surfactant and ligand concentrations and buffer composition. The whole procedure was automated by a multisyringe flow injection analysis (MSFIA) system. Detection limits of 4.9 and 5.6 microg L(-1) were obtained for Al(III) and Fe(III) determination , respectively, and the linear calibration graph up to 300 microg L(-1) (both for Al(III) and Fe(III)) was well adapted to the monitoring of drinking water quality. The system was successfully applied to the on-site determination of Al(III) and Fe(III) at the outlet of two water treatment units during two periods of the year (winter and summer conditions).

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On-line solid-phase extraction and multisyringe flow injection analysis of Al(III) and Fe(III) in drinking water

Vanloot

Branger

Margaillan

et al. 2007

Anal Bioanal Chem

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Electrochemical characterization of 8-hydroxyquinoline-5-sulphonate/aluminium(III) aqueous solutions

Badocco¹,

Dean²,

Marco³

et al. 2007

Electrochimica Acta

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Fluorescence-based method for fast quantification of active aluminums in natural and treated water

Zhang

et al. 2022

Journal of Hazardous Materials

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Flow Injection Extraction Spectrofluorimetric Determination of Aluminium as the Tetraphenylphosphonium Aluminium(iii) 8-Hydroxyquinoline-5-Sulphonate

Cited by 4 publications

References 11 publications

On-line solid-phase extraction and multisyringe flow injection analysis of Al(III) and Fe(III) in drinking water

On-line solid-phase extraction and multisyringe flow injection analysis of Al(III) and Fe(III) in drinking water

Electrochemical characterization of 8-hydroxyquinoline-5-sulphonate/aluminium(III) aqueous solutions

Fluorescence-based method for fast quantification of active aluminums in natural and treated water

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