Speciation and preconcentration of inorganic antimony in waters by Duolite GT-73 microcolumn and determination by segmented flow injection-hydride generation atomic absorption spectrometry (SFI-HGAAS)

Erdem, Aslı; Eroğlu, Ahmet E.

doi:10.1016/j.talanta.2005.04.041

Cited by 26 publications

(14 citation statements)

References 26 publications

(29 reference statements)

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“…Alternatively, (SH)silica shows quantitative sorption only to As(III) at the two extreme points in the investigated pH range, namely, pH 1.0 and 9.0 while As(V) is not retained. This result is in accordance with similar literature studies which suggest that mercapto group is selective generally to the lower oxidation states of the hydride forming elements [30,31,35,36]. On the other hand, (NH 2 )silica demonstrates selectivity only towards As(V), and this response is indicative of the affinity of amine functionality to arsenate ion.…”

Section: Sorption Studies 321 Effect Of Ph On the Sorption Of As(isupporting

confidence: 92%

“…7. From these results it can be suggested that the decrease in percentage Time (min) 35 sorption can once again be referred to the change in the solution pH, and is not a consequence of the reaction time. This conclusion can also be drawn from Fig.…”

Section: As(v) Sorptionmentioning

confidence: 85%

“…In order to prevent the possible matrix-based polyatomic interference of 40 Ar 35 Cl + on 75 As + signal, chloride-containing acids or solvents were not used in the preparation of solutions except during desorption with KIO 3 which also contained HCl. Still, in case the use of any chloride species would be inevitable in the pre-measurement steps, the optimization of ICP-MS parameters was carried out in the collision mode in octopole reaction system with He gas.…”

Section: Instrumentation and Apparatusmentioning

confidence: 99%

“…However, gas phase and liquid phase interferences can be seen during or after the hydride generation step [13]. While inductively coupled plasma-mass spectrometry (ICP-MS) is one of the most sensitive techniques for As determination, the monoisotopic 75 As + signal suffers from the spectral interference of 40 Ar 35 Cl + in the chloride-containing matrixes. This interference can be eliminated (or reduced) by matrix separation through hydride generation [9,14], can be corrected with the use of interference-correction equations, or the formation of ArCl + is prevented by means of collision-cell techniques [15].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and application of a novel mercapto- and amine-bifunctionalized silica for speciation/sorption of inorganic arsenic prior to inductively coupled plasma mass spectrometric determination

Boyacı

Çağır

Shahwan

et al. 2011

Talanta

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a b s t r a c tA bifunctional sorbent, (NH 2 + SH)silica, containing both amine and mercapto functionalities was prepared by modification of silica gel with 3-(triethoxysilyl)propylamine and (3-mercaptopropyl)trimethoxysilane. In addition to the bifunctional sorbent, silica gel was modified individually with the functional mercapto-and amino-silanes, and the mono-functional sorbents, namely (SH)silica and (NH 2 )silica, were also mechanically mixed ((NH 2 )silica + (SH)silica) for the sake of comparison of sorption performances. It has been demonstrated that (SH)silica shows quantitative sorption only to As(III) at two pH values, 1.0 and 9.0, while (NH 2 )silica displays selectivity only towards As(V) at pH 3.0. On the other hand, the bifunctional (NH 2 + SH)silica possesses the efficient features of the two mono-functionalized sorbents; for example, it retains As(III) at a wider pH range, from 1.0 to at least 9.0 with the exception at pH 2.0, and it also shows quantitative sorption to As(V) at pH 3.0. This property gives the bifunctional (NH 2 + SH)silica a better flexibility in terms of sorption performance as a function of solution pH. The mechanically mixed (NH 2 )silica + (SH)silica exhibits a similar but less efficient sorption behavior compared to the bifunctional sorbent. Desorption of both As(III) and As(V) species can be realized using 0.5 M NaOH. The validity of the proposed method was checked through the analysis of a standard reference material and a good correlation was obtained between the certified (26.67 g L −1 ) and determined (27.53 ± 0.37 g L −1 ) values. Spike recovery tests realized with ultrapure water (93.0 ± 2.3%) and drinking water (86.9 ± 1.2%) also confirmed the applicability of the method.

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Section: Sorption Studies 321 Effect Of Ph On the Sorption Of As(isupporting

confidence: 92%

Section: As(v) Sorptionmentioning

confidence: 85%

Section: Instrumentation and Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis, characterization and application of a novel mercapto- and amine-bifunctionalized silica for speciation/sorption of inorganic arsenic prior to inductively coupled plasma mass spectrometric determination

Boyacı

Çağır

Shahwan

et al. 2011

Talanta

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“…[13][14][15][16] Thiol cotton fiber (TCF) is also used for the preconcentration and chemical separation of antimony. 13,17 However, the results from the preconcentration and chemical separation for antimony using TCF varied among those studies.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration Method of Antimony Using Modified Thiol Cotton Fiber for Isotopic Analyses of Antimony in Natural Samples

et al. 2011

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Optical Nanosensor Design with Uniform Pore Geometry and Large Particle Morphology

El‐Safty

Ismail

Matsunaga

et al. 2007

Chemistry A European J

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Appropriate design of nanosensors for optically selective, sensitive sensing systems is needed for naked-eye detection of pollutants for environmental cleanup of toxic heavy-metal ions. Mesostructured materials with two- or three-dimensional (2D or 3D) geometries and large particle morphologies show promise as probe carriers, and can therefore be used to reproducibly fabricate uniformly packed nanosensors. This is the first report on the effects of significant key properties of the mesostructured carriers, such as morphology, geometry, and pore shape, on the functionality of optical nanosensor designs. Such mesostructured sensors with superior physical characteristics can be used as components in sensing systems with excellent stability and sensitivity, and with rapid detection response. The nanosensor design can enhance the selectivity even at low concentrations of the pollutant target ions (nanomolar level). Among the nanosensors developed here, the large pore-surface grains of highly ordered 3D monoliths (HOM) exhibited a high adsorption capability of the Pyrogallol Red probe and high accessibility to analyte ion transport, leading to possible naked-eye detection of Sb(III) ions at concentrations as low as 10(-9) mol dm(-3) and at a wide detection range of 0.5 ppb to 3 ppm. A key finding in our study was that our mesostructured nanosensor designs retained highly efficient sensitivity without a significant increase in kinetic hindrance, despite the slight decrease of the specific activity of the electron acceptor/donor strength of the probe functional group after several regeneration/reuse cycles. The results, in general, indicate that large-scale reversibility of optical nanosensors is feasible in such metal-ion sensing systems.

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Speciation and preconcentration of inorganic antimony in waters by Duolite GT-73 microcolumn and determination by segmented flow injection-hydride generation atomic absorption spectrometry (SFI-HGAAS)

Cited by 26 publications

References 26 publications

Synthesis, characterization and application of a novel mercapto- and amine-bifunctionalized silica for speciation/sorption of inorganic arsenic prior to inductively coupled plasma mass spectrometric determination

Synthesis, characterization and application of a novel mercapto- and amine-bifunctionalized silica for speciation/sorption of inorganic arsenic prior to inductively coupled plasma mass spectrometric determination

Preconcentration Method of Antimony Using Modified Thiol Cotton Fiber for Isotopic Analyses of Antimony in Natural Samples

Optical Nanosensor Design with Uniform Pore Geometry and Large Particle Morphology

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