Pre-concentration procedure for determination of copper and zinc in food samples by sequential multi-element flame atomic absorption spectrometry

Ferreira, Hadla S.; Santos, A. R. dos; Portugal, Lindomar A.; Costa, Antônio Celso Spı́nola; Miró, Manuel; Ferreira, Sérgio Luís Costa

doi:10.1016/j.talanta.2008.05.056

Cited by 69 publications

(29 citation statements)

References 31 publications

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“…Among these, Box-Behnken is a second-order multivariate design technique based on three-level incomplete factorial designs that received widespread application for evaluation of critical experimental conditions, that is, maximum or minimum of response functions. The number of experiments (N) required for the development of this design is defined as N = 2k(k-1) + C 0 , where k is the factor number and C 0 is the replicate number of the central point [14][15][16] .…”

Section: Lead Hasmentioning

confidence: 99%

Removal of Lead from Aqueous Solutions using Fagus orientalis Lipsky: Box-Behnken Experimental Design

Yazdanipour

Akbari²

2012

Orientjchem.

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Section: Lead Hasmentioning

confidence: 99%

Removal of Lead from Aqueous Solutions using Fagus orientalis Lipsky: Box-Behnken Experimental Design

Yazdanipour

Akbari²

2012

Orientjchem.

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“…Adsorption isotherm is important to describe how solutes interact with the sorbent. The Langmuir model is often used: 30 c e /q e = 1/bq m + c e /q m (5) where q m is the maximum adsorption at monolayer (mg· …”

Section: Adsorption Isotherm and Adsorption Capacitymentioning

confidence: 99%

“…Modern instrumental methods including ETAAS, 4 FAAS, [5][6][7] NAA, 8 ICP-MS, 9 ICP-OES 10-11 etc., have been used for the determination of Zn(II). However, it is impossible for Zn(II) to be determined directly due to their low concentration levels of analytes and high levels of matrices.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Thermodynamic Investigations of Zn(II) Adsorption on Microcrystalline Anthracene Modified with 8‐Hydroxyquinoline and Its Application to the Preconcentration and Determination of Trace Zinc

Wang

Yan

2011

J Chinese Chemical Soc

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A new method that utilizes microcrystalline anthracene modified with 8-hydroxyquinoline as an adsorbent has been developed for the preconcentration of trace Zinc(II). The possible reaction mechanism is discussed in detail. The influences of different parameters, such as acidity, other metal ions, the amounts of 8-hydroxyquinoline and anthracene, etc. on the enrichment yield of Zn(II) have been studied to optimize the experimental conditions. The experimental data were fitted well with the pseudo-second-order kinetic model and Langmuir model at all studied temperatures and the maximum adsorption capacity was 32.58 mg·g -1 (300 K). The thermodynamic parameters (DG q , DH q and DS q ) showed the feasibility, exothermic and spontaneous nature of the adsorption at 280~320 K. Experiments indicate that Zn(II) can be completely separated from Cu(II), Co(II), Cd(II), Mn(II), Ni(II) in the eluent. The recovery of this method is in the range of 96.0%~105.0% with preconcentration factor of 100 and the limit of detection after preconcentration is 0.068 mg·L -1 . The proposed method has been successfully applied to the determination of trace Zn(II) in effluents and synthetic water sample having a composition similar to certified water sample SLRS-4 (NRC, Canada). Analytical results obtained by this recommended method were very satisfactory.

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“…Several analytical methods have been reported for the quantitative determination of metals in environmental matrices, like atomic absorption spectrometry (AAS) [1][2][3][4] , inductively coupled plasma optical emission spectroscopy (ICP-OES), liquid chromatography, gas chromatography (GC) 5 .These techniques however usually need pre-concentration steps to achieve the appropriate selectivity and sensitivity but often only meet one of these two. Adsorptive stripping voltammetry (AdSV) was chosen as an alternative method of analysis because these are high sensitivity, low detection limit level µg/L, sample preparation is simple and easy, inexpensive infrastructure.…”

Section: Introductionmentioning

confidence: 99%

ADSORPTIVE STRIPPING VOLTAMMETRIC METHODFOR THE INDIVIDUAL DETERMINATION OFCd(II), Cu(II), Pb(II), AND Zn(II) IN VEGETABLESAMPLES USING CALCEIN

2017

Rasayan J Chem

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Adsorptive stripping voltametric method is presented for the individual determination of Cd(II), Cu(II), Pb(II) and Zn(II) in vegetable samples using calcein as a complexing agent. The purpose of this study was to obtain the optimum condition of each metal ions. The optimized experimental conditions include: concentration of 0.2 mM calcein for Cu(II) and Cd(II), 0.6 mM for Zn(II), and 0.7 mM for Pb(II); pH 6 for Cd(II) and Zn(II), pH 7 for Cu(II) and Pb (

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Pre-concentration procedure for determination of copper and zinc in food samples by sequential multi-element flame atomic absorption spectrometry

Cited by 69 publications

References 31 publications

Removal of Lead from Aqueous Solutions using Fagus orientalis Lipsky: Box-Behnken Experimental Design

Removal of Lead from Aqueous Solutions using Fagus orientalis Lipsky: Box-Behnken Experimental Design

Kinetic and Thermodynamic Investigations of Zn(II) Adsorption on Microcrystalline Anthracene Modified with 8‐Hydroxyquinoline and Its Application to the Preconcentration and Determination of Trace Zinc

ADSORPTIVE STRIPPING VOLTAMMETRIC METHODFOR THE INDIVIDUAL DETERMINATION OFCd(II), Cu(II), Pb(II), AND Zn(II) IN VEGETABLESAMPLES USING CALCEIN

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