A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

Tüzen, Mustafa; Soylak, Mustafa; Çıtak, Demirhan; Ferreira, Hadla S.; Korn, Maria das Graças Andrade; Bezerra, Marcos Almeida

doi:10.1016/j.jhazmat.2008.05.154

Cited by 121 publications

(53 citation statements)

References 33 publications

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“…The detection limit of the proposed method is comparable to those obtained by other methods described in the literature [37,[43][44][45]. The corresponding limit of quantification was calculated from ten times the standard deviation of the blank signal and was found to be 20.2 ng mL -1 .…”

Section: Detection Limitsupporting

confidence: 74%

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Anılan

Gedikbey

Akar³

2010

CLEAN Soil Air Water

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This work describes the modification of silica gel with dimethylglyoxime, in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of dimethylglyoxime-modified silica-gel (DMGMS) was 71.37 mg g -1 and the optimum pH for the quantitative recovery of copper was found to be 5.0. The optimum flow rate, sorbent amount, and sample volume were 1 mL min -1 , 300 mg, and 50 mL, respectively. 10 mL of 0.1 mol L -1 HCl was the most suitable eluent. The detection limit of copper was 6.0 ng mL -1 . The recommended method, for the determination of copper, is simple and reliable, without any notable matrix effect and can be successfully applied to environmental water samples. Copper recovery in the range from 99 -100% was obtained from seawater and thermal spring water using this method. The method was applied to standard reference materials, NIST-1515 (apple leaves) and NIST-1643e (simulated fresh water), for the determination of copper and the results were in good agreement with certified values.

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Section: Detection Limitsupporting

confidence: 74%

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Anılan

Gedikbey

Akar³

2010

CLEAN Soil Air Water

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“…4 Since many azo dyes were examined in the mentioned works 1−4 and TAO turned out to be less sensitive colorimetric reagent than other of the suggested compounds, 1−7 its analytical potential remained unexploited for 2−3 decades. It was not until the beginning of the new millennium, that some analytical applications of TAO appeared, namely determination of cobalt, 8 cadmium, 9 titanium, 9,10 gold, palladium and lead, 11 copper and nickel, 12 and cadmium and lead. 13 The separation/preconcentration techniques used in these applications were chromatography, 8,9 sorption onto activated carbon, 9,10 coprecipitation, 11 solid phase extraction, 12 and cloud-point extraction.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Liquid Extraction-Spectrophotometric Investigations of Three Ternary Complexes of Vanadium(V)

Gavazov¹,

Stefanova²

2014

Croat. Chem. Acta

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Abstract. Complex formation and liquid-liquid extraction (LLE) were studied in systems containing vanadium(V), 5-methyl-4-(2-thiazolylazo)resorcinol (TAO), tetrazolium salt (TZS), water and chloroform. The following three TZSs were used: 3-(4,5-dimethyl-2-thiazol)-2,5-diphenyl-2H-tetrazolium bromide (MTT), 3-(2-naphtyl)-2,5-diphenyl-2H-tetrazolium chloride (Tetrazolium violet, TV), and 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (INT). Concentration of the reagents (TAO and TZS), pH of the aqueous medium, and shaking time were subjects of optimization experiments. Formation of ternary complexes with a composition of 2:2:2 was demonstrated by a set of different methods. Some key characteristics concerning the analytical application of the studied LLE-chromogenic systems were established as well.

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“…This solution was added to the magnetic nano-Fe 3 O 4 -encapsulated-chitosan/ graphene oxide sorbent and by using buffer solution, its pH was modified to 3.0, followed the container was shaken for 25min in order to allow easier Cu ions absorption of the nano-Fe 3 O 4 -encapsulatedchitosan/graphene oxide sorbent [36]. At the end of this stage, the nano-Fe 3 O 4 -encapsulated-chitosan/ graphene oxide sorbent which had been formed on the bottom layer of the beaker was removed through applying an external field with1.4T magnetic powers and was immediately decanted outside the supernatant.…”

Section: General Proceduresmentioning

confidence: 99%

Preparation of Modified Magnetic Nano-Fe3O4 Chitosan/ Graphene Oxide for the Preconcentration and Determination of Copper (П) Ions in Biological and Environmental Water Samples Prior to Flame Atomic Absorption Spectrometry.

Yari

Moghimi²,

Fakhari³

2016

Orient. J. Chem

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A simple, highly sensitive, accurate and selective method for determination of trace amounts of Cu 2+ in water samples .In this paper, chitosan grafted with graphene oxide sheets showed an increased surface area was used to encapsulate nano-Fe 3 O 4 and produce a nano-Fe 3 O 4 -encapsulated-chitosan/ graphene oxide sorbent based new sorbent was prepared. Flame atomic absorption spectrometer was utilized for determination of Cu 2+ .Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditionsthe limit of detection (LOD) and limit of quantification (LOQ)were 0.30,0.750 and theproposed methodhas a good reproducibility 0.90% (RSD %).The enrichment factor was 200 and the percentage of recovery was in the range of 95-100% .The method was successfully applied to the recovery of Cu 2+ in different type of water samples. Graphene oxide and its derivatessuch as magnetic nano-Fe 3 O 4 -encapsulatedchitosan/graphene oxide in this study is full of potential to use as an excellent adsorbent in the extraction method like solid phase extraction(SPE) and solid phase micro extraction(SPME). In the present study, we report the application of preconcentration techniques still continues increasingly for trace metal determinations by flame atomic absorption spectrometry (FAAS) for quantification of Cu 2+ in Formalin-fixed paraffin-embedded (FFPE) tissues from Liver loggerhead turtles. This method exhibits the superiority in compared to the other adsorption reagents because of the fact that there is no necessity of any complexing reagent and optimum pH of solution presents in acidic media.

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A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

Cited by 121 publications

References 33 publications

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Liquid-Liquid Extraction-Spectrophotometric Investigations of Three Ternary Complexes of Vanadium(V)

Preparation of Modified Magnetic Nano-Fe3O4 Chitosan/ Graphene Oxide for the Preconcentration and Determination of Copper (П) Ions in Biological and Environmental Water Samples Prior to Flame Atomic Absorption Spectrometry.

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