Separation of trace antimony and arsenic prior to hydride generation atomic absorption spectrometric determination

Yersel, Müşerref; Erdem, Aslı; Eroğlu, Ahmet E.; Shahwan, Talal

doi:10.1016/j.aca.2005.02.002

Cited by 15 publications

(8 citation statements)

References 20 publications

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“…This finding is in accordance with the results obtained in one of our earlier studies which was about the gas phase interference of Sb(III) during hydride formation in HGAAS system [41]. The interference caused only during hydride formation can be eliminated with the use of ICP-MS if it is available in the laboratory.…”

Section: Interference Studiessupporting

confidence: 82%

Sorption of As(V) from waters using chitosan and chitosan-immobilized sodium silicate prior to atomic spectrometric determination

Boyacı

Eroğlu

Shahwan

2010

Talanta

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Keywords:As(V) As(III) Sorption Chitosan Chitosan-immobilized sodium silicate a b s t r a c t A natural biosorbent containing amine functional groups, chitosan, and a novel sorbent, chitosanimmobilized sodium silicate, were prepared and utilized for the selective sorption of As(V) from waters prior to its determination by atomic spectrometric techniques, namely, hydride generation atomic absorption spectrometry (HGAAS) and inductively coupled plasma mass spectrometry (ICP-MS). Chitosan was synthesized from chitin and sodium silicate was used as the immobilization matrix due to its straightforward synthesis. Through sequential sorption studies, it was shown that chitosan-immobilized sodium silicate has exhibited a better chemical stability than the chitosan itself which demonstrates the advantage of immobilization method. Both chitosan and chitosan-immobilized sodium silicate were shown to selectively adsorb As(V), arsenate, from waters at pH 3.0 at which neither chitin nor sodium silicate displayed any sorption towards As(V). The sorption of arsenate by chitosan is supposed to have electrostatic nature since pH of 3.0 is both the point at which the amino groups in chitosan are protonated and also the predominant form of As(V) is H 2 AsO 4 − . A pre-oxidation step is required if both As(III) and As(V) are to be determined. Desorption from the sorbents was realized with 1.0% (w/v) l-cysteine prepared in a pH 3.0 solution adjusted with HCl. Among the possible interfering species tested, only Te(IV) and Sb(III) were shown to cause a decrease in the sorption capacity especially at high interferant concentrations. High concentrations of Sb(III) also resulted in gas phase interference during hydride generation.The validity of the method was checked both via spike recovery experiments and also through the analysis of a standard reference material. Spike recovery tests were carried out with four different types of water; namely, ultra-pure, bottled drinking, tap, and sea water; and percent recovery values were found to be 114 (±4), 112 (±2), 43 (±4), and 0 (±1), respectively. It was concluded that the proposed methodology can be applied efficiently to low-to-medium ionic strength solutions, such as most drinking waters. The accuracy of the method was additionally investigated through the analysis of a standard reference material and a good correlation was found between the determined (26.6 ± 2.4 g L −1 ) and the certified (26.67 g L −1 ) value.

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Section: Interference Studiessupporting

confidence: 82%

Sorption of As(V) from waters using chitosan and chitosan-immobilized sodium silicate prior to atomic spectrometric determination

Boyacı

Eroğlu

Shahwan

2010

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“…For a better detection limit, arsenic was analyzed by AAS (Thermo Elemental Solar M6 Series) with an air-acetylene burner. Arsenic concentrations were determined by hydride generation atomic absorption spectrometry (HGAAS) method using hollow cathode lamps at 193.7 nm wavelength as described by Yersel et al (2005). The operating conditions for the HGAAS system are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

A health risk assessment for exposure to trace metals via drinking water ingestion pathway

Kavcar

Sofuoğlu

2009

International Journal of Hygiene and Environmental Health

332

127

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A health risk assessment was conducted for exposure to trace metals via drinking water ingestion pathway for Province of İzmir, Turkey. Concentrations of 11 trace metals were measured in drinking waters collected from 100 population weighted random sampling units (houses). The samples were analyzed in atomic absorption spectrometry for arsenic, and inductively coupled plasma-optical emission spectrometry for Be, Cd, Co, Cr, Cu, Mn, Ni, Pb, V, and Zn. Questionnaires were administered to a participant from each sampling unit to determine drinking water consumption related information and demographics. Exposure and risks were estimated for each individual by direct calculation, and for İzmir population by Monte Carlo simulation. Six trace metals (As, Cr, Cu, Mn, Ni, and Zn) were detected in 450% of the samples. Concentrations of As and Ni exceeded the corresponding standards in 20% and 58% of the samples, respectively. As a result, arsenic noncarcinogenic risks were higher than the level of concern for 19% of the population, whereas carcinogenic risks were 410 À4 for 46%, and 410 À6 for 90% of the population.

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“…Hydride generation atomic absorption spectrometry (HGAAS) is the most widely used technique applied either directly or after a suitable pre-treatment step [9][10][11]. Hydride generation method has been reported to have the advantage of determining the different forms of arsenic (different oxidation states and forms bound to organic matter) on the basis of different kinetics of hydride generation by each species [12].…”

Section: Introductionmentioning

confidence: 99%

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

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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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Separation of trace antimony and arsenic prior to hydride generation atomic absorption spectrometric determination

Cited by 15 publications

References 20 publications

Sorption of As(V) from waters using chitosan and chitosan-immobilized sodium silicate prior to atomic spectrometric determination

Sorption of As(V) from waters using chitosan and chitosan-immobilized sodium silicate prior to atomic spectrometric determination

A health risk assessment for exposure to trace metals via drinking water ingestion pathway

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

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