Cloud point extraction and flame atomic absorption spectrometry determination of trace amounts of copper(II) ions in water samples

Fathi, S.A.M.; Yaftian, Mohammad Reza

doi:10.1016/j.jcis.2009.02.071

Cited by 47 publications

(21 citation statements)

References 22 publications

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“…8-hydroxy quinoline, which is known to be one of the effective chelating reagents for Cu 2+ ions, 8,19,29 was selected as the chelating agent. In order to obtain the optimum DLLME-SFO conditions, the influence of different experimental parameters including the type and volume of the extraction and dispersive solvent, extraction time, sample volume, the concentration of chelating agent and salt addition on the performance of DLLME-SFO were investigated.…”

Section: Resultsmentioning

confidence: 99%

“…A variety of methods including electrothermal atomic absorption spectrometry (ETAAS), 5 inductively coupled plasma-optical emission spectrometry (ICP-OES), 6 graphite furnace atomic absorption spectrometry (GFAAS), 7 and flame atomic absorption spectrometry (FAAS) 8,9 have been developed for the determination of Cu in various sample matrices. Among them, FAAS is most widely used due to its low cost, easy operation, high sample throughput and good selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Development of Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop for the Sensitive Determination of Trace Copper in Water and Beverage Samples by Flame Atomic Absorption Spectrometry

Wu¹,

Zhao²,

Ying-li³

et al. 2011

Bulletin of the Korean Chemical Society

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A dispersive liquid-liquid microextraction based on solidification of floating organic droplet (DLLME-SFO) has been developed as a new approach for the extraction of trace copper in water and beverage samples followed by the determination with flame atomic absorption spectrometry. In the DLLME-SFO, 8-hydroxy quinoline, 1-dodecanol, and methanol were used as chelating agent, extraction solvent and dispersive solvent, respectively. The experimental parameters related to the DLLME-SFO such as the type and volume of the extraction and dispersive solvent, extraction time, sample volume, the concentration of chelating agent and salt addition were investigated and optimized. Under the optimum conditions, the enrichment factor for copper was 122. The method was linear in the range from 0.5 to 300 ng mL −1 of copper in the samples with a correlation coefficient (r) of 0.9996 and a limit of detection of 0.1 ng mL −1 . The method was applied to the determination of copper in water and beverage samples. The recoveries for the spiked water and beverage samples at the copper concentration levels of 5.0 and 10.0 ng mL −1 were in the range between 92.0% and 108.0%. The relative standard deviations (RSD) varied from 3.0% to 5.6%.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop for the Sensitive Determination of Trace Copper in Water and Beverage Samples by Flame Atomic Absorption Spectrometry

Wu¹,

Zhao²,

Ying-li³

et al. 2011

Bulletin of the Korean Chemical Society

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“…Cloud point extraction (CPE), known also as micellemediated phase separation extraction, is an attractive technique that reduces the consumption of and exposure to solvent, disposal costs and extraction time [7][8][9][10][11][12][13][14]. In general, the CPE of a metal ion takes place via a complex formation of the analyte with a lipophilic ligand.…”

Section: Introductionmentioning

confidence: 99%

“…Schiff base ligands bearing nitrogen and oxygen donor atoms have been shown to exhibit interesting ionophoric properties, in particular toward heavy metal ions, and their applications in different separation and preconcentration techniques have been investigated [15,16]. For instance, Schiff base ligands are used as a modifier of octadecyl membrane disks for separation and concentration of trace amounts of metal ions [11]. These ligands have been also used in CPE methodology [15,17].…”

Section: Introductionmentioning

confidence: 99%

Determination of cadmium(II) ion by atomic absorption spectrometry after cloud point extraction

et al. 2012

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In this work, cloud point extraction (CPE) technique was developed for the separation and pre-concentration of Cd(II). CPE was used with lipophilic hexadentate (N 4 O 2 ) Schiff base ligand, L 22pysa (1, C 24 H 26 N 4 O 2 ). The methodology is based upon the formation of a Cd(II)/L complex soluble in a micellar phase the non-ionic surfactant Triton X-114. This complex is then extracted into the surfactant-rich phase above its cloud point temperature. Several important variables that affect the CPE were investigated and optimized. Under the optimum experimental conditions, the calibration graph was linear over the range 1-100 ng mL -1 with a correlation coefficient of 0.9997. The detection limit obtained under optimum conditions was 0.44 ng mL -l . The proposed method was successfully applied to the determination of Cd(II) in rice and various water samples.

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“…4,5 Thus, a preconcentration and separation step is usually needed before measuring. Various separation techniques including solid phase extraction, 6,7 coprecipitation, 8 solvent extraction, 9 dispersive liquidliquid extraction, 10 and cloud point extraction [11][12][13][14][15][16] have been proposed for separation and preconcentration of copper in order to improve the inadequate sensitivity of FAAS and reduce the matrix effect. Among these methods, recently, cloud point extraction has attracted considerable attention mainly because it is in consistence with the "green chemistry" principles.…”

Section: Introductionmentioning

confidence: 99%

Cloud Point Extraction of Trace Amounts of Copper and Its Determination by Flow Injection Flame Atomic Absorption Spectrometry

Baghban¹,

Shabani²,

Dadfarnia³

et al. 2012

Croat. Chem. Acta

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Abstract. A simple and convenient method based on cloud point extraction was proposed for the determination of copper. The extraction was carried out in the presence of 2-[(2-mercaptophenylimino)-methyl]phenol (MPMP) as the chelating ligand and octylphenoxypolyethoxyethanol (Triton X-114) as the non-ionic surfactant. After phase separation, the surfactant rich phase containing the complex was diluted with 1.0 mol L -1 solution of HNO 3 in methanol and the analyte concentration was determined by flow injection flame atomic absorption spectrometry. Under the optimum conditions, an enhancement factor of 81 was obtained for the preconcentration of copper with 25 mL sample solution. The calibration graph was linear in the range of 1-150 µg L -1 , the relative standard deviation (RSD) for ten replicate determinations at 80 µg L -1 Cu level was 1.8 %, and the limit of detection (3 s) and quantification (10 s) were 0.15 and 0.50 μg L -1 respectively. The accuracy of method was confirmed by analysis of certified reference materials and recovery experiments. The proposed method was successfully applied to the determination of copper in rice flour and water samples. (doi: 10.5562/cca1803)

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Cloud point extraction and flame atomic absorption spectrometry determination of trace amounts of copper(II) ions in water samples

Cited by 47 publications

References 22 publications

Development of Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop for the Sensitive Determination of Trace Copper in Water and Beverage Samples by Flame Atomic Absorption Spectrometry

Development of Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop for the Sensitive Determination of Trace Copper in Water and Beverage Samples by Flame Atomic Absorption Spectrometry

Determination of cadmium(II) ion by atomic absorption spectrometry after cloud point extraction

Cloud Point Extraction of Trace Amounts of Copper and Its Determination by Flow Injection Flame Atomic Absorption Spectrometry

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