Flow injection on-line preconcentration and flame atomic absorption spectrometric determination of iron, cobalt, nickel, manganese and zinc in sea-water

Tony, Kurissery A.; Kartikeyan, S.; Vijayalakshmy, B.; Rao, T. Prasada; Iyer, C.S.P.

doi:10.1039/a808345b

Cited by 62 publications

(21 citation statements)

References 27 publications

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“…Urine analysis is often used for monitoring environmental and occupational exposure to trace elements because urine is the most readily available biological fluid, and most trace elements are mainly extracted via urine. 2 Several analytical techniques, such as atomic absorption spectrometry (AAS), [4][5][6][7] inductively coupled plasma-atomic emission spectrometry (ICP-AES) 8 and inductively coupled plasma-mass spectrometry (ICP-MS) 9 are available for the determination of trace metals with sufficient sensitivity for most applications. However, the determination of trace metal ions in urine samples is difficult due to various factors, particularly their low concentrations and matrix effects.…”

Section: Introductionmentioning

confidence: 99%

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Manzoori

Karim‐Nezhad

2003

ANAL. SCI.

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A new approach for developing a cloud-point extraction-flame atomic absorption spectrometric method has been described and used for the determination of cobalt. In this approach, water was removed from the final diluted surfactant rich phase obtained in cloud-point extraction procedure. The results indicated that removing water from this phase increased the enhancement factor by 4-fold. 1-(2-Pyridylazo)-2-naphthol (PAN) and octylphenoxypolyethoxyethanol (Triton X-114) were used as a hydrophobic ligand and a nonionic surfactant, respectively. The chemical variables affecting the preconcentration step were optimized. The effect of the water concentration in the final diluted methanolic surfactant solution on the analytical signal was investigated. The results showed that the analytical signal decreased by 30% and 52% in 15% and 25% water concentrations in methanol, respectively. An enhancement factor of 115 was obtained for cobalt extracted from only 10 ml of a sample. The detection limit obtained under the optimal condition was 0.38 µg l -1 . The proposed procedure was applied to the determination of cobalt in urine samples.

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Section: Introductionmentioning

confidence: 99%

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Manzoori

Karim‐Nezhad

2003

ANAL. SCI.

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“…In CPE with a simple single-step extraction procedure analysis of many samples enable researchers to perform the overall procedure easily on-line [14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Combination of cloud point extraction and flame atomic absorption spectrometry for preconcentration and determination of trace iron in environmental and biological samples

et al. 2008

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Abstract:In the presented work, the conditions for cloud point extraction of iron from aqueous solutions using 7-iodo-8-hydroxyquinolin-5-sulphonic acid (Ferron) was investigated and optimized. The procedure is based on the separation of its ferron complex into the micellar media by adding the surfactant Triton X-114. After phase separation, the surfactant-rich phase was dissolved with 1.0 M HNO 3 in methanol. Iron was determined by flame atomic absorption spectrometry. Optimization of the pH, ligand and surfactant quantities, incubation time, temperature, viscosity, sample volume, and interfering ions were investigated. The effects of the matrix ions were also examined. The detection limits for three times the standard deviations of the blank for iron was 0.4 ng m L -1, enrichment factor of 19.6 and preconcentration factor of 30 could be achieved. The validity of cloud point extraction was checked by employing real samples including soil, blood, spinach, milk, meat, liver and orange juice samples using the standard addition method, which gave satisfactory results. © Versita Warsaw and Springer-Verlag Berlin Heidelberg. Keywords: 7-iodo-8-hydroxyquinolin-5-sulphonic acid (Ferron) • Iron • Cloud point extraction • Triton X-114 •Flame atomic absorption spectrometry Research ArticleAbbreviation TAN and Phen -tannins and other phenolic compound, PMBP -1-phenyl-3-methyl-4-benzoyl-5-pyrazolone, GF-AAS -graphite furnace atomic absorption spectrometry, FAAS -flame atomic absorption spectrometry.

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“…Particularly, the coupling between flow injection analysis (FIA) and solid-phase extraction (SPE) has assumed to have increased in importance during the last few years. In this context, FIA systems using different no modified solid sorbents, such as silica-C18, 4 polyurethane foams, [5][6][7][8] activated carbon, 9 alumina 10,11 or even fullerene, 12 are described in the literature. In fact, these sorbents have been employed in different forms besides unloaded or not modified: (i) loaded with specific reagents or (ii) functionalized with specific ligands.…”

Section: Introductionmentioning

confidence: 99%

On-line Preconcentration and Determination of Zn in Natural Water Samples Employing a Styrene-Divinylbenzene Functionalized Resin and Flame Atomic Absorption Spectrometry

Cassella

Magalhães

Couto³

et al. 2005

ANAL. SCI.

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Flow injection on-line preconcentration and flame atomic absorption spectrometric determination of iron, cobalt, nickel, manganese and zinc in sea-water

Cited by 62 publications

References 27 publications

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Combination of cloud point extraction and flame atomic absorption spectrometry for preconcentration and determination of trace iron in environmental and biological samples

On-line Preconcentration and Determination of Zn in Natural Water Samples Employing a Styrene-Divinylbenzene Functionalized Resin and Flame Atomic Absorption Spectrometry

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