A sequential injection method for the determination of aluminum in drinking water using fluorescence enhancement of the aluminum–morin complex in micellar media

Al-Kindy, Salma M.Z.; Suliman, Fakhr Eldin O.; Salama, Sofia

doi:10.1016/s0026-265x(03)00025-0

Cited by 57 publications

(31 citation statements)

References 14 publications

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“…Nevertheless, for analytical purpose, the advent of atomic absorption spectroscopy (AAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) turned out to be an improvement for aluminium determination, compared to the traditional fluorometric method. Fluorescence of aluminium complexes is now rather used in highly selective and sensitive methods such as high-performance liquid chromatography with post-column fluorescence detection [13], sequential injection method with fluorescence sensing [14], visual fluorometry on thin layers [15], etc.…”

Section: Introductionmentioning

confidence: 99%

How can aluminium(III) generate fluorescence?

Mulon

Destandau

Alain

et al. 2005

Journal of Inorganic Biochemistry

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Section: Introductionmentioning

confidence: 99%

How can aluminium(III) generate fluorescence?

Mulon

Destandau

Alain

et al. 2005

Journal of Inorganic Biochemistry

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“…It was reported in literature that Cu 2+ and Fe 3+ gave lower recovery of Al 3+ due to quenching effect of these species on the fluorescence intensity of Al-morin complex. It is reported in literature that recovery of Al 3+ can be improved when 1,10-phenanthroline and hydroxylamine were added to the samples before analysis [31].…”

Section: Discussionmentioning

confidence: 99%

“…It was reported that the most probable stoichiometry of Al:morin is 1:2 in methanol and 1:1 in acidic media [29]. It was reported in literature to utilize the strong chelating power of flavonoids with Al 3+ to quantify flavonoids or aluminum with low detection limits based on fluorescence [30][31][32].…”

Section: Effect Of Morin Concentrationmentioning

confidence: 99%

Separation/Preconcentration Methods for the Determination of Aluminum in Dialysate Solution and Scalp Hair Samples of Kidney Failure Patients

Khan

Kazi

Baig

et al. 2011

Biol Trace Elem Res

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A new method is reported for the separation of aluminum ions (Al(3+)) from interfering cations in pharmaceutical and biological samples through solid-phase extraction (SPE) using 2-methyl-8-hydroxyquinoline (8-hydroxyquinaldine) on activated silica. While separated Al(3+) was preconcentrated by cloud point extraction (CPE) using 3,5,7,2'-4'-pentahydroxyflavone (morin) as complexing reagent, the resulting complex was entrapped in nonionic surfactant (Triton X-114) as prior step to its determination by spectrofluorimetry (SPF). The validity of separation/preconcentration of Al(3+) was checked by certified reference material of human hair and standard addition method. The chemical variables affecting the analytical performance of the separation/preconcentration methods were studied and optimized. The enrichment factor and detection limit of Al(3+) for the preconcentration of 10 ml of dialysate solution and acid-digested samples of scalp hair samples were found to be 25 and 0.34 μg/L, respectively. The relative standard deviation for six replicates of standard containing 20 μg/L of Al(3+) was <10%. In all DS, the concentration of Al was >10 μg/L. The level of Al in scalp hair samples of kidney failure patients was higher than healthy controls.

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“…The quality control of drinking water is a world concern and several chemical species should be rigorously controlled [16,17]. Among these, some heavy metals such as lead and cadmium are most critical.…”

Section: Introductionmentioning

confidence: 99%

Application of Box–Behnken design in the optimisation of an on-line pre-concentration system using knotted reactor for cadmium determination by flame atomic absorption spectrometry

Souza

Santos²,

Ferreira³

2005

Spectrochimica Acta Part B: Atomic Spectroscopy

112

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The present paper proposes an on-line pre-concentration system for cadmium determination in drinking water using flame atomic absorption spectrometry (FAAS). Cadmium(II) ions are retained as 1-(2-pyridylazo)-2-naphthol (PAN) complex at the walls of a knotted reactor, followed of elution using hydrochloric acid solution. The optimization was performed in two steps using factorial design for preliminary evaluation and a Box-Behnken design for determination of the critical experimental conditions. The variables involved were: sampling flow-rate, reagent concentration, pH and buffer concentration, and as response the analytical signal (absorbance). The validation process was performed considering the parameters: linearity and other characteristics of the calibration curve, analytical features of on-line pre-concentration system, precision, effect of other ions in the pre-concentration system and accuracy. Using the optimized experimental conditions, the procedure allows cadmium determination with a detection limit (3 j / S) of 0.10 Ag L À 1 , a quantification limit (10 j / S) of 0.33 Ag L À1 , and a precision, calculated as relative standard deviation (RSD) of 2.7% (n = 7) and 2.4% (n = 7) for cadmium concentrations of 5 and 25 Ag L À 1 , respectively. A pre-concentration factor of 18 and a sampling frequency of 48 h À1 were obtained. The recovery for cadmium in the presence of several ions demonstrated that this procedure could be applied for the analysis of water samples. The method was applied for cadmium determination in drinking water samples collected in Salvador City, Brazil. The cadmium concentrations found in five samples were lower than the maximum permissible levels established by the World Health Organization. D

show abstract

A sequential injection method for the determination of aluminum in drinking water using fluorescence enhancement of the aluminum–morin complex in micellar media

Cited by 57 publications

References 14 publications

How can aluminium(III) generate fluorescence?

How can aluminium(III) generate fluorescence?

Separation/Preconcentration Methods for the Determination of Aluminum in Dialysate Solution and Scalp Hair Samples of Kidney Failure Patients

Application of Box–Behnken design in the optimisation of an on-line pre-concentration system using knotted reactor for cadmium determination by flame atomic absorption spectrometry

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