Spectrofluorimetric determination of aluminum in drinking waters by sequential injection analysis

A selective procedure for the determination of Al 3+ in drinking and natural waters is proposed. The analytical procedure is based both on the complex formation between Al 3+ and 8-hydroxyquinoline-5-sulfonic acid (HQS) and on a fluorimetric detection of the complex. The reaction was carried out in...

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Published inAnalytica chimica acta Vol. 457; no. 2; pp. 311 - 318
Main Authors Brach-Papa, C, Coulomb, B, Boudenne, J.-L, Cerda, V, Theraulaz, F
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2002
Subjects
Aluminum
Fluorimetry
Sequential injection analysis
Water
Water
Sequential injection analysis
Fluorimetry
Aluminum
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Summary:A selective procedure for the determination of Al 3+ in drinking and natural waters is proposed. The analytical procedure is based both on the complex formation between Al 3+ and 8-hydroxyquinoline-5-sulfonic acid (HQS) and on a fluorimetric detection of the complex. The reaction was carried out in presence of thioglycolic acid as a masking agent. This procedure has been adapted to a sequential injection analysis (SIA) system. Operative conditions both for batch and SIA procedures were investigated including reagent concentration, volumes, pH and wavelengths used for the fluorimetric detection. Batch procedure allows determination of Al 3+ at ppb level (LOQ: 2.8 μg l −1) within a working range of 2.2–300 μg l −1. The SIA procedure was successfully employed for the determination of Al 3+ in several commercial drinking and tap waters.
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ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(02)00050-8