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cloud point extraction of copper

Cloud point extraction for the determination of copper ...

A cloud point extraction procedure was presented for the preconcentration of copper, nickel and cobalt ions in various samples. After complexation with methyl-2-pyridylketone oxime (MPKO) in basic medium, analyte ions are quantitatively extracted to the phase rich in Triton X-114 following centrifugation. 1.0 mol L(-1) HNO(3) nitric acid in methanol was added to the surfactant-rich phase prior ...

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The cloud point extraction of copper(II) with ...

Mar 10, 2003  Thus the cloud point extraction of copper with 1-(2-thiazolylazo)-2-naphtol into the NS Triton X-114 phases is shown . The using of 0.05% Triton X-114 solution for the extraction of copper allows to decrease the limit of metal determination to 0.27 ng ml −1 by the AAS.

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CLOUD POINT EXTRACTION FOR THE DETERMINATION OF

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

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Study on the Cloud Point Extraction of Copper(II) from an ...

Dec 01, 2009  Removal of Copper(II) from a Concentrated Sulphate Medium by Cloud Point Extraction Using an N,N′-Bis(salicylaldehyde)Ethylenediimine Di-Schiff Base Chelating Ligand. Journal of Surfactants and Detergents 2014 , 17 (1) , 27-35.

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Cloud point extraction for the determination of trace ...

Jan 31, 2008  Cloud point extraction has been used for preconcentration of trace amount of copper. The analyte was complexed with 1,2-dihydroxyanthraquinone-3-sulfonic acid sodium salt, and octylphenoxypolyethoxyethanol was added as a surfactant. The effects of experimental conditions such as pH, concentration of chelating agent and surfactant, equilibration temperature and time on cloud point extraction ...

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Cloud Point Extraction of Copper, Lead, Cadmium, and Iron ...

Nov 27, 2019  A cloud point extraction procedure was optimized for the separation and preconcentration of lead(II), cadmium(II), copper(II), and iron(III) ions in We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies.

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Cloud point extraction for the determination of copper in ...

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 ...

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Cloud Point Extraction of Trace Amounts of Copper and Its ...

N. Baghban et al., Cloud Point Extraction of Trace Amounts of Copper 87 Croat. Chem. Acta 85 (2012) 85. Rice Flour Preparation One gram of rice flour was placed in a 100 mL beaker, 7 mL ...

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Sensitive Determination Of Copper By Cloud Point ...

Key words: Cloud point extraction, Flame atomic absorption spectrometry, Copper. Introduction Everyone is exposed to trace amounts of copper through air, soil, household dust, food, drinking water and various consumers. Inorganic copper arising from a number of industrial and mining sources occurs in water in the +2 oxidation state1.

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Determination of Copper in Human Urine by Cloud Point ...

The relative standard deviation was less than 3.5% for copper concentrations from 0.5 to 100.0 µg/L following cloud point extraction. The correlation coefficients of

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Cloud point extraction for the determination of copper ...

Feb 11, 2008  A cloud point extraction procedure was presented for the preconcentration of copper, nickel and cobalt ions in various samples. After complexation with methyl-2-pyridylketone oxime (MPKO) in basic medium, analyte ions are quantitatively extracted to the phase rich in Triton X-114 following centrifugation. 1.0 mol L(-1) HNO(3) nitric acid in ...

More

Study on the Cloud Point Extraction of Copper(II) from an ...

Dec 01, 2009  Removal of Copper(II) from a Concentrated Sulphate Medium by Cloud Point Extraction Using an N,N′-Bis(salicylaldehyde)Ethylenediimine Di-Schiff Base Chelating Ligand. Journal of Surfactants and Detergents 2014 , 17 (1) , 27-35.

More

Cloud Point Extraction of Copper, Lead, Cadmium, and Iron ...

A cloud point extraction procedure was optimized for the separation and preconcentration of lead(II), cadmium(II), copper(II), and iron(III) ions in We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies.

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Cloud Point Extraction of Trace Amounts of Copper and Its ...

N. Baghban et al., Cloud Point Extraction of Trace Amounts of Copper 87 Croat. Chem. Acta 85 (2012) 85. Rice Flour Preparation One gram of rice flour was placed in a 100 mL beaker, 7 mL ...

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Cloud Point Extraction of Copper, Zinc, Iron and Nickel in ...

(2009). Cloud Point Extraction of Copper, Zinc, Iron and Nickel in Biological and Environmental Samples by Flame Atomic Absorption Spectrometry. Separation Science and Technology: Vol. 44, No. 3, pp. 773-786.

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Cloud point extraction for the determination of copper in ...

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 ...

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Cloud point extraction for the determination of trace ...

Cloud point extraction for the determination of copper(II) is proposed after the formation of a complex with sulfapyridylazo resorcinol (SPAR) and later measurement by flame atomic absorption spectrometry (FAAS) using Triton X-100 as a surfactant. The surfactant-rich phase was diluted with nitric acid in methanol, prior to FAAS measurement.

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Sensitive Determination Of Copper By Cloud Point ...

Key words: Cloud point extraction, Flame atomic absorption spectrometry, Copper. Introduction Everyone is exposed to trace amounts of copper through air, soil, household dust, food, drinking water and various consumers. Inorganic copper arising from a number of industrial and mining sources occurs in water in the +2 oxidation state1.

More

Determination of Copper in Human Urine by Cloud Point ...

The relative standard deviation was less than 3.5% for copper concentrations from 0.5 to 100.0 µg/L following cloud point extraction. The correlation coefficients of

More

Optimization of Cloud Point Extraction of Copper with ...

For example, cloud point extraction, 2-4 solid-phase extraction, 5-7 liquid extraction [8][9][10] etc., while most often copper(II) is pre-bound into ion pairs or complexes (chelates in particular ...

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Cloud point extraction of copper, lead, cadmium, and iron ...

A cloud point extraction procedure was optimized for the separation and preconcentration of lead(II), cadmium(II), copper(II), and iron(III) ions in various water and canned food samples. The metal ions formed complexes with 2,6-diamino-4-phenyl-1,3,5-triazine that were extracted by surfactant-rich phases in the nonionic surfactant Triton X-114.

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Cloud point extraction for the determination of copper in ...

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

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Development of a cloud-point extraction method for copper ...

Development of a cloud-point extraction method for copper and nickel determination in food samples

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Development of a cloud point extraction ...

Jan 10, 2007  A simple and efficient cloud point extraction-spectrofluorimetric method for the determination of copper(II) in different samples has been proposed. The procedure is based on the oxidation of thiamine with copper(II) to form highly fluorescent thiochrome, its extraction to Triton X-114 micelles and spectrofluorimetric determination.

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Cloud point extraction for the determination of copper ...

Feb 11, 2008  A cloud point extraction procedure was presented for the preconcentration of copper, nickel and cobalt ions in various samples. After complexation with methyl-2-pyridylketone oxime (MPKO) in basic medium, analyte ions are quantitatively extracted to the phase rich in Triton X-114 following centrifugation. 1.0 mol L(-1) HNO(3) nitric acid in ...

More

Cloud point extraction for the determination of copper in ...

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

More

Cloud Point Extraction of Trace Amounts of Copper and Its ...

N. Baghban et al., Cloud Point Extraction of Trace Amounts of Copper 87 Croat. Chem. Acta 85 (2012) 85. Rice Flour Preparation One gram of rice flour was placed in a 100 mL beaker, 7 mL ...

More

Cloud point extraction for the determination of copper in ...

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 ...

More

Cloud point extraction for the determination of trace ...

Cloud point extraction for the determination of copper(II) is proposed after the formation of a complex with sulfapyridylazo resorcinol (SPAR) and later measurement by flame atomic absorption spectrometry (FAAS) using Triton X-100 as a surfactant. The surfactant-rich phase was diluted with nitric acid in methanol, prior to FAAS measurement.

More

Development of a cloud-point extraction method for copper ...

Development of a cloud-point extraction method for copper and nickel determination in food samples

More

Optimization of Cloud Point Extraction of Copper with ...

For example, cloud point extraction, 2-4 solid-phase extraction, 5-7 liquid extraction [8][9][10] etc., while most often copper(II) is pre-bound into ion pairs or complexes (chelates in particular ...

More

Cloud Point Extraction of Trace Amounts of Copper and Its ...

Abstract. A simple and convenient method based on cloud point extraction was proposed for the deter- mination 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.

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Use of cloud point extraction for removal of nanosized ...

Triton X-114 based cloud point extraction has been demonstrated to be an advantageous approach for the recovery of nanosized copper oxide (NCO) from water. The removal of NCO was influenced by the concentrations of TX-114 and salt, incubation temperature and time, as well as solution pH. With the addition of 0.3% (w/v) Triton X-114, over 88% of the spiked NCO was removed from wastewater after ...

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Determination of Trace Copper(II) in Food Samples by Flame ...

KEY WORDS: Cloud point extraction, Copper, Food samples , Flame atomic absorption spectrometry. INTRODUCTION Copper is an essential element not only for life in mammals but also for plants, and it plays an important role in carbohydrate and lipid metabolism. It has many biological

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A green analytical procedure for determination of copper ...

A green analytical procedure exploiting cloud point extraction for determination of copper and iron in plant materials is presented. After sample digestion with a diluted oxidant mixture (HNO 3 + H 2 O 2 ) in a closed vessel microwave oven, metal ions were simultaneously extracted as hydrophobic complexes formed with 1,2-tiazolylazo-2-naphthol ...

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Development of a cloud point extraction ...

Jan 10, 2007  A simple and efficient cloud point extraction-spectrofluorimetric method for the determination of copper(II) in different samples has been proposed. The procedure is based on the oxidation of thiamine with copper(II) to form highly fluorescent thiochrome, its extraction to Triton X-114 micelles and spectrofluorimetric determination.

More

Cloud Point Extraction for the Determination of Trace ...

A cloud point extraction (CPE) procedure which was developed for the separation and preconcentration of trace amounts of cobalt is combined with flame atomic absorption spectrometry (FAAS) to determine trace amounts of cobalt in water and food samples. The procedure is based on the formation of the hydrophobic complex between Co(II) and 4-methoxy-2-sulfo-benzenediazoaminoazo-benzene

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Atomic-Absorption Determination of Copper(II) in Water ...

Abstract We study and optimize the conditions for the cloud-point extraction (CPE) preconcentration of Cu(II) in the form of its complex with 6,7-dihydroxy-4-methyl-2-phenylbenzopyrylium chloride in the micellar phase of the nonionic surfactant Triton X-100. The introduction of ammonium benzoate into the system until a pH of 4.5 is reached at a Triton X-100 concentration of 0.4 vol % leads to ...

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