Simultaneous Preconcentration of Cd(II) and Pb(II) with N,N′-bis(4-methoxysalicylidene) Ethylenediamine Coated Silica Gel Prior to Determination by Flame Atomic Absorption Spectrometry

Tokay, Feyzullah; Bağdat, Sema

doi:10.1007/s11270-015-2352-3

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…It was previously reported that the intensity of the Schiff base modified silica gel decreases. 22 As seen in Figure 3, the pattern is consistent with the literature. Briefly, FT-IR and XRD analysis have proven the modification of silica gel with MSPA Schiff base successfully.…”

Section: Characterization Of Si-mspasupporting

confidence: 91%

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Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media

Koluman¹,

Tokay²,

Bağdat³

2016

Turk J Chem

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A novel preconcentration method for Pb and Zn ions using a column packed with Schiff base modified silica gel is described. The method was based on the sorption of analytes on N,N'-bis(4-methoxysalicylidene)-1,3-propanediamine modified silica gel and elution with HNO 3 prior to flame atomic absorption analysis. The parameters pH, flow rate, sample volume, eluent volume, and concentration were optimized using a central composite design. The detection limits were 10.0 µ g L −1 for Pb and 1.1 µ g L −1 for Zn. The suggested procedure was validated with Lake Ontario water as a certified reference material and recovery percentages were 101.8% for Pb and 98.2% for Zn. The application of the method was performed on snow, tap, bottled, mineral, and lake water samples and recovery percentages were in the range of 96.7%-101.6% and 96.4%-98.4% for Pb(II) and Zn(II), respectively.

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Section: Characterization Of Si-mspasupporting

confidence: 91%

“…The modification period of the Si-MSPA was monitored according to the literature. 22 Accordingly, 1 mL of Schiff base solution was pipetted from the liquid phase and the absorbance was monitored at 328 nm for 6 h with 1-h intervals.…”

Section: Immobilization Of Mspa On Silica Gel and Column Preparationmentioning

confidence: 99%

Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media

Koluman¹,

Tokay²,

Bağdat³

2016

Turk J Chem

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“…N,N′‐bis(4‐methoxy salicylidene) ethylenediamine was synthesised by condensation reaction of 4‐methoxy salicylidene and ethylenediamine (Merck) (Tokay & Bağdat Yaşar, ; Tokay & Bağdat, ). Silica gel (70–230 mesh) was received from Merck and modified with MSE, according to our previous work (Tokay & Bağdat, ). Conostan oil‐based Fe(III) standard (5000 mg kg −1 ; code number: 354770) and Cu(II) standard (5000 mg kg −1 ; code number: 687850) (Baie D'Urfe, QC, Canada) were used for testing the recommended procedure.…”

Section: Methodsmentioning

confidence: 99%

“…The basic principle of the technique is the transfer of analyte from liquid phase to active sites of solid phase. In comparison with other preconcentration and separation techniques, SPE has some advantages such as simplicity, rapidity, cheapness, selectivity, ability to achieve high preconcentration factor and suitability for combining to the detection techniques (Shemirani et al, 2004;Soylak & Ercan, 2009;Kara, 2011;Kara & Fisher, 2012;Tokay & Ba gdat, 2015b).…”

Section: Introductionmentioning

confidence: 99%

Spectrometric determination of iron and copper in vegetable oils after separation with Schiff base impregnated silica gel column: A simple approach for eliminating the high organic matrix

Tokay

Bağdat

2015

Int J of Food Sci Tech

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A simple solid-phase extraction method has been described for the separation of Fe(III) and Cu(II) from liquid vegetable oils using N,N 0 -bis(4-methoxy salicylidene) ethylenediamine impregnated silica gel and the determination of these ions. The experimental parameters that affect the separation/preconcentration of ions were investigated by batch and column methods prior to the determination by flame atomic absorption spectrometry. Fe(III) and Cu(II) ions in 20.0 g portion of oil samples can be quantitatively sorbed and then eluted completely with 5.0 mL of 2.0 mol L À1 HNO 3 . Limits of detection were calculated as 22.8 and 13.9 lg kg À1 for Fe(III) and Cu(II), respectively. The repetition of the suggested method was checked by finding relative standard deviation for five repeated analyses, which was 1.5% for Fe(III) and 0.1% for Cu(II). Applicability of the method was controlled with spiked and unspiked sunflower, corn, canola, olive, soya and hazelnut oils.

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“…Especially, sorption techniques have been widely used because they are simple, economical, and cost-effective. Some sorbents, such as activated carbon [ 1 ], C18 [ 2 ], polymers [ 3 ], silica gel [ 4 ], various resins [ 5 ], polyurethane foams [ 6 ] and biomass [ 7 ] suffer from low sorption capacities, efficiencies or their applicability, which is often restricted only to limited number of analytes. Nanomaterials play an important role to solve this problem because of their high surface area, enhanced active sites, and additionally the presence of numerous functional groups on their surfaces [ 8 – 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) with ethylenediamine-modified graphene oxide

et al. 2015

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We describe a novel solid phase sorbent that was synthesized by coupling graphene oxide (GO) to ethylenediamine (EDA). This nanomaterial (referred to as GO-EDA) is capable of adsorbing the ions of iron, cobalt, nickel, copper, zinc and lead. The ethylenediamine-modified graphene oxide was characterized by X-ray photoelectron spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. The analytical procedure relies on (a) sorption of metal ions on GO-EDA dispersed in aqueous samples; (b) filtering, and (c) direct submission of the filter paper to energy-dispersive X-ray fluorescence spectrometry. This kind of dispersive micro-solid phase extraction was optimized with respect to pH values, concentration of GO-EDA, contact time, and the effects of interfering ions and humic acid on recovery of determined elements. Under optimized conditions, the recoveries of spiked samples range from 90 to 98 %. The detection limits are 0.07, 0.10, 0.07, 0.08, 0.06 and 0.10 ng mL−1 for Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II), respectively. The method has a relative standard deviation of <6 %, and its accuracy was verified by analysis of two standard reference materials [LGC6016 (estuarine water) and BCR-610 (groundwater)]. It was successfully applied to the determination of trace amounts of these metal ions in water samples.Graphical AbstractGraphene oxide was coupled to ethylenediamine in order to obtain an effective sorbent (GO-EDA) for preconcentration of Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) from environmental water samplesElectronic supplementary materialThe online version of this article (doi:10.1007/s00604-015-1629-y) contains supplementary material, which is available to authorized users.

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Simultaneous Preconcentration of Cd(II) and Pb(II) with N,N′-bis(4-methoxysalicylidene) Ethylenediamine Coated Silica Gel Prior to Determination by Flame Atomic Absorption Spectrometry

Cited by 8 publications

References 24 publications

Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media

Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media

Spectrometric determination of iron and copper in vegetable oils after separation with Schiff base impregnated silica gel column: A simple approach for eliminating the high organic matrix

Preconcentration of Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) with ethylenediamine-modified graphene oxide

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