Spectrofluorimetric method for determination of aluminium with chromotropic acid and its application to water samples

Park, Chan-Il; Cha, Ki-Won

doi:10.1016/s0039-9140(99)00351-3

Cited by 28 publications

(21 citation statements)

References 8 publications

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“…This investigation complements two previous studies devoted to the fluorimetric determination of aluminium chelated by chromotropic acid at pH=4 [25,26]. The critical approach undertaken here enabled us to improve the limits of the calibration plot, linear up to 500 µg L -1 , with a detection limit of 0.65 µg L -1 .…”

Section: Resultssupporting

confidence: 68%

“…It is noteworthy that the method used here, and based on a thorough critical investigation, results in a linear response of the fluorescence signal over a larger range of aluminium concentration than previously reported [25,26]. The detection limit is also improved.…”

Section: Calibrationmentioning

confidence: 64%

“…discrepancies between the two papers mentioned above [25,26], for example with regard to chelate stoichiometry; 2. the lack of any comprehensive study of the enhancement of fluorescence emission on complexation, and 3. the need to clarify the use of acetic acid/acetate buffer (pH=4) reported in Refs. [25] and [26]; acetic acid is, in fact, a ligand for Al(III) [27] so its use in large excess compared with the fluorogenic ligand could be questionable.…”

Section: Introductionmentioning

confidence: 98%

“…Although its complexing properties have been recognized for a long time [20,21], its fluorogenic character was reported later and first exploited for boron [22,23], and beryllium [24] determination. Two papers were then published, clarifying analytical procedures for aluminium determination [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Chromotropic acid, a fluorogenic chelating agent for aluminium(III)

Destandau

Alain

Bardez

2004

Analytical and Bioanalytical Chemistry

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Complexation of aluminium(III) with the fluorogenic ligand chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulfonic acid) has been revisited with the aim of using enhancement of the fluorescence intensity as an analytical tool. Complexation at the optimum pH approximately 4 was shown to lead to a 1:1 complex with a stability constant log beta110=18.4 +/- 0.7. The fluorogenic effect was thoroughly investigated. Nearly selective excitation of the chelate rather than the ligand could be achieved at wavelengths longer than 360 nm. For analytical purposes the main interfering ion was Ga3+. The strongest competing ligand was shown to be citric acid. Competitive complexation by acetate or formate ions can also make their use in a buffer at the usual concentration, 0.2 mol L(-1), questionable, whereas a 10(-2) mol L(-1) formic acid buffer was shown to be a good alternative. The calibration plot showed that the dependence of response on Al(III) concentration was linear up to 500 microg L(-1); the detection limit was 0.65 microg L(-1) (3 SDblank, n=10, SD= +/- 1.4% at 10 microg L(-1) and +/- 0.8% at 100 microg L(-1)). The analytical procedure was successfully applied to several samples of tap water and the results were in good agreement with those from AAS determination.

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Section: Resultssupporting

confidence: 68%

Section: Calibrationmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Chromotropic acid, a fluorogenic chelating agent for aluminium(III)

Destandau

Alain

Bardez

2004

Analytical and Bioanalytical Chemistry

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“…Many methods for Al 3+ determination in aqueous solutions relying on several fluorogenic ligands have been reported [35][36][37]. However, the determination of Al 3+ in solid biological sample (scalp hair) is generally performed by GF-AAS, probably because the complicated matrix of these samples that makes the direct determination of Al by fluorimetric methods as devised for environmental samples is very difficult [38].…”

Section: Discussionmentioning

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

et al. 2010

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A sensitive and selective spectrofluorimetric method has been developed for the rapid determination of aluminium. This method is based on the complex formation between aluminium and 2-hydroxy-1-naphthylidene-(8-aminoquinoline) (HNAQ). The optimum conditions for the complex formation were a metal-to-ligand (M : L) stoichiometric ratio of 1:1, a pH of 5.5 and a 0.20 m acetate buffer. The fluorescence of the complex was monitored at an emission wavelength of 502 nm with excitation at 438 nm. Under these conditions, linear calibration curves were obtained in the ranges 0.05-1 and 1-5 ppm. The detection limit was 3.4 ppb for the former and 13.5 ppb for the latter. The maximum relative standard deviation of the method for an aluminium standard of 200 ppb was 1.5% (n = 5). This method was successfully applied for the determination of aluminium in drinking water, pharmaceutical antacid tablets and suspension samples.

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Spectrofluorimetric method for determination of aluminium with chromotropic acid and its application to water samples

Cited by 28 publications

References 8 publications

Chromotropic acid, a fluorogenic chelating agent for aluminium(III)

Chromotropic acid, a fluorogenic chelating agent for aluminium(III)

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

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

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