Determination of vanadium, manganese, silver and lead by graphite furnace atomic absorption spectrometry after preconcentration on silica-gel modified with 3-aminopropyltriethoxysilane

Ekinci, C.; Köklü, Ünel

doi:10.1016/s0584-8547(00)00259-7

Cited by 67 publications

(37 citation statements)

References 13 publications

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“…The synthesis procedure was gathered from similar studies with some modifications [32][33][34][35][36]. Prior to functionalization, pretreatment of silica gel was carried out to remove the possible surface contaminants (e.g.…”

Section: Synthesis Of 3-aptes-functionalized Silicamentioning

confidence: 99%

Synthesis of aminopropyl triethoxysilane-functionalized silica and its application in speciation studies of vanadium(IV) and vanadium(V)

Erdem

Shahwan

Çağır

et al. 2011

Chemical Engineering Journal

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a b s t r a c tA solid phase extraction sorbent, aminopropyl triethoxysilane-functionalized silica was prepared and used for vanadium speciation prior to inductively coupled plasma mass spectrometric determination. The necessary sorption parameters such as sorption pH, reaction temperature, sorbent amount and sample volume were optimized. The sorption for V(V) and V(IV) under the optimized conditions was 98% (±1) and was lower than 10%, respectively. The sorption process was investigated both from a kinetic perspective and also in terms of Freundlich, Dubinin-Radushkevich and Langmuir isotherm models to characterize the uptake of vanadate ion by the functionalized silica. Desorption from the sorbent was realized with 0.5 mol L −1 thiourea prepared in 0.2 mol L −1 HCl. Among the possible interfering species tested, Te(IV), Se(IV), Se(VI) and Fe(III) showed interference effects with V(V) signal. The validity of the method was first checked via spike recovery experiments with four different types of water; namely ultra pure, bottled drinking, tap, and sea water for different concentrations of V(V). The percent recovery values changed between 87 and 108 for all water types. The accuracy of the proposed methodology was also checked by analyzing a standard reference material (NIST, SRM 1643e) and a good agreement was found between the determined and the certified value. The proposed methodology has also been shown to be applicable for the separate sorption of V(V) in the absence/presence of V(IV) and for the sorption of both V(IV) and V(V) in waters. The amount of V(IV) can then be determined from the difference.

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Section: Synthesis Of 3-aptes-functionalized Silicamentioning

confidence: 99%

Synthesis of aminopropyl triethoxysilane-functionalized silica and its application in speciation studies of vanadium(IV) and vanadium(V)

Erdem

Shahwan

Çağır

et al. 2011

Chemical Engineering Journal

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“…2 Various sorbents such as multi-walled carbon nanotubes (MWCNTs), 3 alumina, 4 activated carbon, 5 polytetrafluoroethylene (PTFE), 6 chelating ions exchange resin 7 and silica gel [8][9][10][11][12][13][14] have been used and studied in SPE. The conventional batch or column procedure for preconcentration based on SPE has proven an effective method, but it is tedious, time-consuming, requires large sample and reagent volume.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration and Determination of Trace Silver Ion Using Benzothiazole Calix[4]arene Modified Silica by Flow Injection Flame Atomic Absorption Spectrometry

et al. 2014

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“…Several methods for the determination of trace metals have been commonly conducted by flame atomic absorption spectrometry (FAAS) [22], graphite furnace atomic absorption spectrometry (GFAAS) [23], inductively coupled plasma-atomic/optical emission spectroscopy (ICP-AES/OES) [24][25][26] or inductively coupled plasmamass spectrometry.…”

Section: Introductionmentioning

confidence: 99%

The multielement analysis of the apple peel using ICP-OES method

Stojanović¹,

Mitić²,

Paunović³

et al. 2014

Savr tehnol

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The content of 21 elements in the peel of five apple cultivars was determined by using the inductively coupled plasma optical emission (ICP-OES) spectrometry. Among the major elements, the most abundant is K, followed by Ca, P, Na and Mg. The most abundant among the microelements are Fe, B, Mn, V, Cu and Zn. In terms of heavy metals (As, Cd, Pb), it can be concluded that the concentrations of As, Cd, Ni and Pb are below permissible levels prescribed by national legislation and EU Directives. The results obtained from this study show that there are no health risks from the consumption of apples when compared with the levels stipulated by health authorities. Principal component analysis (PCA) was applied to classify the analyzed elements in five apple cultivars according to their contents.

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Determination of vanadium, manganese, silver and lead by graphite furnace atomic absorption spectrometry after preconcentration on silica-gel modified with 3-aminopropyltriethoxysilane

Cited by 67 publications

References 13 publications

Synthesis of aminopropyl triethoxysilane-functionalized silica and its application in speciation studies of vanadium(IV) and vanadium(V)

Synthesis of aminopropyl triethoxysilane-functionalized silica and its application in speciation studies of vanadium(IV) and vanadium(V)

Preconcentration and Determination of Trace Silver Ion Using Benzothiazole Calix[4]arene Modified Silica by Flow Injection Flame Atomic Absorption Spectrometry

The multielement analysis of the apple peel using ICP-OES method

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