Simultaneous preconcentration and determination of copper, nickel, cobalt and lead ions content by flame atomic absorption spectrometry

Ghaedi, Mehrorang; Ahmadi, Farshad; Shokrollahi, Ardeshir

doi:10.1016/j.jhazmat.2006.08.012

Cited by 499 publications

(247 citation statements)

References 19 publications

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“…This is a significant advantage over silica based sorbents, which are unstable due to either hydrolysis of the bonded chain at low pH or dissolution of silica at high pH. [16][17][18][19] The chemical inertness, fast adsorption, and desorption kinetics of the proposed sorbent make it attractive in on-line column preconcentration systems. The column also has long lifetime without the need for pre-conditioning or activation steps.…”

Section: Discussionmentioning

confidence: 99%

“…Up to now, various SPE sorbents have been employed for the preconcentration and determination of cobalt both in batch and FI modes. Some of these sorbents include C-18 bonded silica, 9-12 activated carbon, [13][14][15][16] functionalized cellulose, 17,18 knotted reactor, [19][20][21][22] modified alumina, [23][24][25][26] silica gel modified with glycerol, 27 and C-60 fullerene. 12 Among these solid phase sorbents, a good alternative to achieve very versatile systems that can be applied to a wide range of samples is the use of polymeric solid supports functionalized with complexing reagents.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

Chamjangali

Sharif-Razavian

Bahramian

2010

J. Braz. Chem. Soc.

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Foi desenvolvido um método simples e sensível de espectrometria de absorção atômica em chama com injeção por fluxo para a pré-concentração em linha e determinação de níveis traço de cobalto(II). Uma mini-coluna empacotada com poliestireno clorometilado e funcionalizado com N,N-bis(naftilidenoimina)dietilenotriamina (PS-NAPdien) foi utilizada para o enriquecimento em sistema de fluxo de cobalto(II) a partir de amostras em pH 7.0. Todas as variáveis químicas e de fluxo foram otimizadas. Sob condições ótimas, o gráfico de calibração foi linear na faixa de concentração de 1.0-80.0 e 0.30-0.40 µg L -1 para a pré-concentração de volumes de soluções de 10.0 e 20.0 mL, respectivamente. Os valores de limites de detecção para a pré-concentração de amostras para volumes de 10.0 e 20.0 mL foram 0.75 e 0.25 µg L -1 , respectivamente. Um fator de enriquecimento de 110 para um volume de amostra de 10.0 mL foi obtido. Os desvios padrão relativos para 10 replicatas de cobalto(II) nos níveis de 10.0 e 60.0 µg L -1 foram 4.7 e 3.3%, respectivamente. A exatidão do método proposto foi demonstrada a partir da determinação de Co(II) em diferentes amostras de água usando experimentos de adição e recuperação.A simple and sensitive flow injection-flame atomic absorption spectrometric (FI-FAAS) method was developed for on-line preconcentration and determination of trace levels of cobalt(II). A mini-column packed with a chloromethylated polystyrene, functionalized with N,N-bis(naphthylideneimino)diethylenetriamine (PS-NAPdien) was used for on-line enrichment of cobalt (II) , respectively. An enrichment factor of 110 for a sample volume of 10.0 mL was obtained. The relative standard deviations for 10 replicate determinations of cobalt(II) at the 10.0 and 60.0 µg L -1 levels were 4.7 and 3.3%, respectively. The accuracy of the proposed method was demonstrated by determining Co(II) in different spiked water samples.Keywords: flame atomic absorption spectrometry, on-line preconcentration, flow injection, polystyrene, cobalt(II) IntroductionCobalt is an essential element for humans and animals because it is associated with the synthesis of vitamin B 12 . On the other hand, cobalt is also classified as an environmental toxin. It can harm the natural environment, even at low concentrations, through its inherent toxicity and its tendency to accumulate in the food chain. Therefore, it is clear that the determination of trace amounts of cobalt in biological and environmental samples plays an important role in the fields of environmental surveillance, food control, medicine and toxicology.Atomic spectrometric methods are extensively employed for the quantification of metal species.1 In particular, FAAS has been one of the most applied methods for the determination of inorganic elements in a variety of samples.2 However, its main problem is the low sensitivity for some elements at the µg L -1 level. To improve FAAS sensitivity and selectivity, preconcentration procedures are frequently required. Solid phase extraction (SPE) has found increasing appl...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

Chamjangali

Sharif-Razavian

Bahramian

2010

J. Braz. Chem. Soc.

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“…A variety of techniques such as inductively coupled plasma mass spectrometry (ICP-MS) [9], ICP-atomic spectrometry [10,11], electrothermal atomic absorption spectrometry [12] and flame atomic absorption spectrometry (FAAS) [13][14][15][16] has been widely used for the determination of trace metal in different samples.…”

Section: Introductionmentioning

confidence: 99%

Determination of Trace Amounts of Lead by Modified Graphite Furnace Atomic Absorption Spectrometry after Liquid Phase Microextraction with Pyrimidine-2-thiol

Nazari¹

2011

AJAC

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The liquid phase microextraction (LPME) was combined with the modified Graphite furnace atomic absorption spectrometry (GF-AAS) for determination of lead in the water and solid samples. In a preconcentration step, lead was extracted from a 2 ml of its aqueous sample in the pH = 5 as lead-Pyrimidine-2-thiol cationic complex into a 4 µl drop of 1,2 dichloroethane and ammonium tetraphenylborate as counter ion immersed in the solution. In the drop, the lead-Pyrimidine-2-thiol ammonium tetraphenylborate ion associated complex was formed. After extraction, the microdrop was retracted and directly transferred into a graphite tube modified by [W.Pd.Mg] (c). Some effective parameters on extraction and complex formation, such as type and volume of organic solvent, pH, concentration of chelating agent and counter ion, extraction time, stirring rate and effect of salt were optimized. Under the optimum conditions, the enrichment factor and recovery were 525% and 94%, respectively. The calibration graph was linear in the range of 0.01 -12 µg·L -1 with correlation coefficient of 0.9975 under the optimum conditions of the recommended procedure. The detection limit based on the 3S b criterion was 0.0072 µg·L -1 and relative standard deviation (RSD) for ten replicate measurement of 0.1 µg·L -1 and 0.4 µg·L -1 lead was 4.5% and 3.8% respectively. The characteristic concentration was 0.0065 µg·L -1 equivalent to a characteristic mass of 26 fg. The results for determination of lead in reference materials, spiked tap water and seawater demonstrated the accuracy, recovery and applicability of the presented method.

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“…Pre-concentration and separation techniques, such as liquid-liquid extraction, ion exchange, co-precipitation etc. can solve these problems and lead to a higher confidence level and easy determination of the trace elements [2][3][4][5][6][7][8] . Solid phase extraction procedures based on sorption of metal complexes on various support, such as silica gel, alumina and activated carbon in the two past centuries have been widely used for this purpose, among which activated carbon has been widely applied.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Preconcentration of Copper, Nickel, Cobalt and Lead Ions Prior to Their Flame Atomic Absorption Spectrometric Determination

2007

Self Cite

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Summary -A sensitive and simple method for the simultaneous preconcentration of nutritionally important minerals in real samples has been reported. The method is based on the adsorption of Cu 2+ , Ni 2+ , Co 2+ and Pb 2+ on 4-propyl-2-thiouracil (PUT) loaded on activated carbon. The metals on the complexes are eluted using 5 mL 3 M HNO 3 in acetone. The influences of the analytical parameters including pH and sample volume were investigated. The effects of matrix ions on the retentions of the analytes were also examined. The recoveries of analytes were generally higher than 95 %. The detection limits for Cu 2+ , Ni 2+ , Co 2+ and Pb 2+ were 1.6, 1.3, 1.2, 2.3 ng ml -1 , respectively. The method has been successfully applied for these metals content evaluation in some real samples including natural water samples.

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Simultaneous preconcentration and determination of copper, nickel, cobalt and lead ions content by flame atomic absorption spectrometry

Cited by 499 publications

References 19 publications

Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

Synthesis and application of a functionalized polystyrene resin for on-line preconcentration and determination of cobalt(II) in water samples by flow injection/FAAS

Determination of Trace Amounts of Lead by Modified Graphite Furnace Atomic Absorption Spectrometry after Liquid Phase Microextraction with Pyrimidine-2-thiol

Simultaneous Preconcentration of Copper, Nickel, Cobalt and Lead Ions Prior to Their Flame Atomic Absorption Spectrometric Determination

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