Preconcentration and separation of copper, nickel and zinc in aqueous samples by flame atomic absorption spectrometry after column solid-phase extraction onto MWCNTs impregnated with D2EHPA-TOPO mixture

Vellaichamy, S.; Palanivelu, K.

doi:10.1016/j.jhazmat.2010.10.023

Cited by 141 publications

(31 citation statements)

References 33 publications

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“…13,14 In particular, the adsorbent preconcentration flow injection systems have been seen as a very useful tool because of the simplicity, high preconcentration factors, easy regeneration of the solid phase, low consumption of sample and reagents and high sample throughput. 15 Although SPE associated with flow injection systems has been very well recognized as an efficient analytical tool for improving the detectability of spectroanalytical techniques, its success depends on selective and adsorptive performance of adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

Zappielo¹,

Nanicuacua²,

Santos³

et al. 2016

Journal of the Brazilian Chemical Society

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Carbon black (CB) grafted with 3-mercaptopropyltrimethoxysilane (3-MPTMS) was used as solid phase extractor for Cd 2+ in a flow injection system coupled to flame atomic absorption spectrometry (FAAS). The influence of pH, buffer concentration, preconcentration flow rate and eluent concentration on preconcentration of Cd 2+ were investigated by means of chemometric tools. The characterization of the adsorbent chemically modified was performed by Fourier transform infrared, scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis, Raman spectroscopy and textural analysis. To perform the on-line preconcentration, 20.0 mL of a pH 7.0 Cd 2+ solution at a flow rate of 4.0 mL min −1 was loaded through 30.0 mg of modified CB and then eluted with 1.0 mol L −1 HCl toward the FAAS instrument. The limits of detection and quantification were found to be 0.20 and 0.66 µg L −1 , respectively. Addition and recovery tests carried out in real samples (mineral, tap and saline waters, and cigarette sample) and the analysis of certified reference material (TORT-2, lobster hepatopancreas reference) attested the applicability of proposed method.

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Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

Zappielo¹,

Nanicuacua²,

Santos³

et al. 2016

Journal of the Brazilian Chemical Society

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“…The intensity of Al 2 O 3 -D2EHPA is higher than the others. The characteristic bands of P=O, P-O-C, or P-O-H and O-H were 1247, 1054, 1480, and 3500 cm -1 , respectively (Khaldun et al 2008;Vellaichamy and Palanivelu 2011).…”

Section: Resultsmentioning

confidence: 99%

D2EHPA-impregnated alumina for adsorption of strontium ions in environmental samples

Kalal

Abdollahi

Ashoor

et al. 2016

Int. J. Environ. Sci. Technol.

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The alumina impregnated by the di-2-ethyl hexyl phosphoric acid was introduced to make more adsorption of strontium as well as to determine the optimal conditions. The influence of various parameters such as pH, equilibrium time, adsorbent mass, interfering ions, and various eluant agents for the desorption of the strontium ions, initial concentration, and temperature was investigated to find out the adsorption behavior of the adsorbent under different conditions. The adsorbent was characterized by the Fourier transform infrared spectroscopy. The experimental data were fitted on the two-parameter and three-parameter adsorption isotherm models. The Freundlich and Redlich-Peterson models have suitable fitting on the experimental data (R 2 = 0.9307). The kinetic models of adsorption were analyzed by the pseudo-firstand pseudo-second-order models. The results have been indicated that the pseudo-second-order kinetic model is more appropriate than the others. Advantages of our method were simple operation, less time for preparation of adsorbent, rapid phase separation, and capability to combine with various detection techniques. The method has been utilized to extract and the recovery of strontium ions in environmental aqueous samples.

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“…The RSD of the method was < 1.32. A comparison of the characteristic data between some existing reported methods and the proposed method for separation/preconcentration and determination of Ni(II) by FAAS [36][37][38][39][40][41][42][43][44][45][46][47][48] is given in Table 4. As Table 4 shows, the proposed method exhibits a comparable capacity factor, a low detection limit and a wide linear range, as well as being a convenient, safe, simple, and inexpensive method for the determination of trace quantities of Ni(II) in real samples giving satisfactory results.…”

Section: Resultsmentioning

confidence: 99%

Preconcentration of Ni(II) on Silica gel Loaded with New Synthesized Schiff base and Their Determination by FAAS

Masoudinia¹,

Nateghi²,

Khosousi³

2014

Orient J Chem

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Flame atomic absorption spectrometry (FAAS), is often used for the determination of trace metal ions. The direct determination of metal ions at trace level is limited due to their low concentration and matrix interferences. Therefore, a preconcentration or separation step is frequently necessary to improve the detection limit and sensitivity. For this purpose, several separation and preconcentration procedures such as solvent extraction, co- ORIENTAL JOURNAL OF CHEMISTRY ABSTRACTA preconcentration method was developed for the determination of trace amounts of Ni(II) by atomic absorption spectrometry. The method is based on the retention of the metal cations by modified silica gel adsorbent. The adsorbed metals were then eluted with nitric acid and the Ni(II) was determined by flame atomic absorption spectrometry. The optimal extraction and elution conditions were studied. The effects of diverse ions on the preconcentration were also investigated. A preconcentration factor of 100 can easily be achieved. Calibration graph was obtained and the detection limit of the method for Ni(II) was 1.3 ng mL -1 . The relative standard deviation (RSD) of 0.66-1.32 % was obtained. The method was applied successfully to the determination of Ni(II) in water samples.

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Preconcentration and separation of copper, nickel and zinc in aqueous samples by flame atomic absorption spectrometry after column solid-phase extraction onto MWCNTs impregnated with D2EHPA-TOPO mixture

Cited by 141 publications

References 33 publications

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

D2EHPA-impregnated alumina for adsorption of strontium ions in environmental samples

Preconcentration of Ni(II) on Silica gel Loaded with New Synthesized Schiff base and Their Determination by FAAS

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