The cloud point extraction of copper(II) with monocarboxylic acids into non-ionic surfactant phase

Kulichenko, S. A.; Doroschuk, Volodymyr O.; Lelyushok, Serhii

doi:10.1016/s0039-9140(02)00617-3

Cited by 84 publications

(35 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The preconcentration factor and detection limits of the proposed method are comparable with various separationpreconcentration methods. [13][14][15][28][29][30][31][32][33][34] The low RSD of real sample analysis is an indication of methods versatility for real sample. …”

Section: Resultsmentioning

confidence: 99%

“…The small volume of the surfactant-rich phase obtained with this methodology permits the design of extraction schemes that are simple, cheap, highly efficient, and of lower toxicity to the environment than those extractions that use organic solvents. The CPE phenomenon has been used for the extraction and preconcentration of metal cations [13][14][15][16][17][18][19] after the formation of sparingly water-soluble complexes. CPE has been shown to be an effective sample preconcentration technique for improving sensitivity and selectivity prior to atomic spectrometry.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

et al. 2008

View full text Add to dashboard Cite

Recebido em 13/12/06; aceito em 5/7/07; publicado na web em 19/12/07 A simple cloud point extraction procedure is presented for the preconcentration of copper in various samples. After complexation by 4-hydroxy-2-mercapto-6-propylpyrimidine (PTU), copper ions are quantitatively extracted into the phase rich in Triton X-114 after centrifugation. Methanol acidified with 0.5 mol L -1 HNO 3 was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). Analytical parameters including concentrations for PTU, Triton X-114 and HNO 3 , bath temperature, centrifugation rate and time were optimized. The influences of the matrix ions on the recoveries of copper ions were investigated. The detection limits (3SD b /m, n=4) of 1.6 ng mL -1 along with enrichment factors of 30 for Cu were achieved. The proposed procedure was applied to the analysis of environmental samples.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

et al. 2008

View full text Add to dashboard Cite

show abstract

“…[4][5][6][7][8][9][10] Sodium dodecylsulfate (SDS), which has low toxicity and is easily biodegraded, was used as the extraction medium. The purpose of this study is the extraction of a copper(II) ammine-complex with SDS after ion-pair formation.…”

Section: Introductionmentioning

confidence: 99%

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

et al. 2004

View full text Add to dashboard Cite

The extraction and separation of copper(II), zinc(II), cobalt(II), and cadmium(II) were investigated. Both copper(II) and zinc(II) formed ammine-complexes, while cadmium(II) and cobalt(II) formed hydroxide precipitates in an ammonia medium. By the addition of sodium dodecylsulfate (SDS), a copper(II) complex formed an ion-pair (copper-ammine-DS), which was extracted into the SDS phase. However, a zinc(II) complex did not form an ion-pair, and was soluble in water. Copper(II) ion was recovered by stripping (back-extraction) after the addition of hydrochloric acid. This method was applied to the separation of copper(II) in a brass alloy.

show abstract

“…To date, CPE has been used for the extraction and preconcentration of metal ions after the formation of sparingly water-soluble complexes; then the complex in the surfactant-rich phase is determined by different spectrometric methods. [22][23][24][25][26][27][28][29][30][31] In the present work, we report on the results obtained from applying the CPE for the extraction of Ag + and Mg 2+ ions from various samples and their determination by flame atomic absorption spectrometry.…”

Section: Introductionmentioning

confidence: 99%

Using an Indol Derivative as Complexing Agent for Cloud Point Preconcentration and Determination of Magnesium and Silver Ions in Various Samples by Faas

Shokrollahi

Tavallali

Montaseri

et al. 2012

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

A very simple cloud point extraction (CPE) methodology for the preconcentration of trace amounts of silver and magnesium as a prior step for their determination by flame atomic absorption spectrometry (FAAS) has been developed. The method is based on the extraction of silver and magnesium at pH 10 by using non-ionic surfactant Triton X-114 and 4 methyl-3-((1-H-Indol-3-iyl) (phenyl) methyl)) -1-H-Indol (MPBIM) as a complexing agent. Several important variables that affect the CPE efficiency and FAAS signal were investigated and optimized. The calibration curves, using the preconcentration system, were linear in the range of 0.007-0.200 μg mL -1 with a correlation coefficient of 0.999. The lower limits of detection (3s) obtained in the optimal conditions were 1.47 ng mL -1 and 3.00 ng mL -1 for Mg 2+ and Ag + ions, respectively. The relative standard deviation for five replicate determinations of magnesium and silver at 0.133 μg mL -1 concentration level, were 1.17 and 0.97, respectively. The proposed method was successfully applied to the ultra-trace determination of silver and magnesium in various water samples, blood serum, urine, and radiology film samples.

show abstract

The cloud point extraction of copper(II) with monocarboxylic acids into non-ionic surfactant phase

Cited by 84 publications

References 7 publications

Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

Using an Indol Derivative as Complexing Agent for Cloud Point Preconcentration and Determination of Magnesium and Silver Ions in Various Samples by Faas

Contact Info

Product

Resources

About