cloud point extraction of copper

  • 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

  • Development of a cloud point extraction ...

     · 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.

  • Article Metrics | Simplified cloud point extraction for ...

    A simple and sensitive cloud point extraction method has been developed for the preconcentration of ultra-trace amounts of gold as a prior step to its determination by electrothermal atomic absorption spectrometry. It is based on the extraction of gold in hydrochloric acid medium using the non-ionic surfactant polyethyleneglycolmono-p-nonylphenylether (PONPE 7.5) without adding a chelating agent.

  • 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 ...

  • 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.

  • Application of dual-cloud point extraction for the trace ...

    An efficient, innovative preconcentration method, dual-cloud point extraction (d-CPE) has been developed for the extraction and preconcentration of copper (Cu 2+ ) in serum samples of different viral hepatitis patients prior to couple with flame atomic absorption spectrometry (FAAS). The d-CPE procedure was based on forming complexes of elemental ions with complexing reagent 1-(2 …

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

     · 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.

  • Selective Cloud Point Extraction and Preconcentration of ...

    The proposed procedure was successfully applied to the determination of copper in liver samples. KEY WORDS : Cloud point extraction, Spectrophotometry, Copper, Dithizone. INTRODUCTION Copper is a nutritionally essential metal and is widely distributed in nature [1-3]. There is a great need to develop

  • Cloud point extraction and flame atomic absorption ...

     · A cloud point extraction procedure was presented for the preconcentration of copper(II) ion in various samples. After complexation by 4-(phenyl diazenyl) benzene-1,3-diamine (PDBDM) (chrysoidine), copper(II) ions were quantitatively recovered in Triton X-114 after centrifugation. 0.5ml of methanol acidified with 1.0molL(-1) HNO3 was added to ...

  • Comparison of ultrasound-assisted cloud point extraction ...

    In this work, ultrasound-assisted cloud point extraction (UA-CPE) and ultrasound-assisted dispersive liquid liquid microextraction (UA-DLLME) were investigated and compared firstly as ultrasound-assisted liquid phase microextraction methods, which were coupled with spectrophotometer for copper preconcentration and detection.

  • 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 ...

  • Preconcentration of copper by cloud point extraction with ...

     · Several cloud point extraction procedures have been reported for preconcentration of copper using common nonionic surfactants, such as Triton X-100 and Triton X-114, and different spectroscopic techniques [20–22]. The main drawbacks are the high cloud points of some of the surfactants used, and the presence of other species in the extracted ...

  • Preconcentration and determination of iron and copper in ...

    A flow injection (FI) cloud point extraction (CPE) method for the determination of iron and copper by flame atomic absorption spectrometer (FAAS) has been improved. The analytes were complexed with 3-amino-7-dimethylamino-2-methylphenazine (Neutral Red, NR) and octylphenoxypolyethoxyethanol (Triton …

  • Nonidet™ P-40 CP | 9002-93-1

    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 …

  • 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.

  • Cloud-point extraction, preconcentration and ...

     · Cloud point extraction was used to the preconcentration of copper in different samples. The method, which is based on the cloud point extraction of the complex of copper with ATAP, allows the determination of copper as low as 1.2 ng mL −1. The proposed method requires inexpensive instrumentation and offers safety, good selectivity, accuracy ...

  • (PDF) Cloud-point extraction, preconcentration and ...

    A new, simple and sensitive cloud point extraction procedure was presented for the preconcentration and determination of copper(II) ion in food, water and biological samples. The analyte was complexed with a new synthesized reagent,

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

    Cloud-point extraction is based on the property copper and nickel in these matrices is usually carried out by that a solute present in aqueous solution of non-ionic surfactant flame atomic absorption spectrometry (FAAS), electrothermal is distributed between two phases.

  • A centrifuge-less cloud point extraction ...

    A new cloud point extraction-chromogenic system for Cu(II) was studied. • A novel commercially available hydrophobic thiazolylazo dye was used. • The developed procedure is simple, sensitive, economical, and green. • Water samples and a saline solution for infusion were analyzed for Cu(II).

  • 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, 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.

  • Toward a robust analytical method for separating trace ...

    Cloud point extraction (CPE) factors, namely Triton X-114 (TX-114) concentration, pH, ionic strength, incubation time, and temperature, were optimized for the separation of nano-sized copper(II) oxide (nCuO) in aqueous matrices. The kinetics of phase transfer was studied using UV-visible spectroscop …

  • Cloud Point Extraction as a Procedure of Separation and ...

    Cloud point extraction for the copper species was prepared at different buffered pH solutions. The separation of by copper ion cloud point extractioninvolves prior formation of a complex with sufficient hydrophobic and the Amoxicillin drug to be extracted into the small volume of the surfactant-rich phase. ...

  • 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 …

  • 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.

  • 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 …

  • Determination of Zinc, Copper, and Mercury in Water ...

    A novel micro cloud point extraction (MCPE) was developed as a fast, simple, and economical preconcentration method for spectrophotometric determination of Zn, Cu, and Hg in water samples. In contrary to traditional cloud point extraction, this method does not need heating.

  • Cloud point extraction for the determination of trace ...

    Abstract.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 ...

  • Evaluation of a cloud point extraction approach for the ...

    The cloud point extraction (CPE) of commercial copper(II) oxide nanoparticles (CuO NPs, mean diameter of 28nm) in water samples was fully investigated. Factors such as Triton X-114 (TX-114) concentration, pH, incubation temperature and time, were optimized. The …

  • A new cloud point microextraction method for ...

    In cloud point extraction system, temperature of extraction is very important parameter for micelles occurring26. The effect of temperature was investigated in the range of 25-65°C. It was found that CPE sensitivity increased with increase in temperature from 25 …

  • Cloud point extraction for the determination of trace ...

     · 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 ...

  • Cloud point extraction and flame atomic absorption ...

    A cloud point extraction procedure for the preconcentration of Cu(II) ion in environmental samples is presented. After complexation with 7-iodo-8-hydroxyquinoline-5-sulfonic acid, the analyte was quantitatively extracted from the phase rich in the surfactant alkylphenol polyoxyethylene, concentrated, and determined by flame atomic absorption spectrometry.

  • Cloud point extraction and flame atomic absorption ...

    A cloud point extraction procedure was presented for the preconcentration of copper(II) ion in various samples. After complexation by 4-(phenyl diazenyl) benzene-1,3-diamine (PDBDM) (chrysoidine), copper(II) ions were quantitatively recovered in Triton X-114 after centrifugation. 0.5ml of methanol acidified with 1.0molL(-1) HNO3 was added to the surfactant-rich phase prior to its analysis by ...

  • A new ultrasonic-assisted cloud-point-extraction procedure ...

    A new ultrasonic-assisted cloud-point-extraction procedure for pre-concentration and determination of ultra-trace levels of copper in selected beverages and foods by flame atomic absorption spectrometry. Altunay N(1), Gürkan R, Orhan U.

  • Determination of cadmium, cobalt, copper, lead, nickel and ...

     · The aim of this study was to develop a cloud point extraction (CPE) method to determine simultaneously cadmium, cobalt, copper, nickel, lead and zinc contents in produced water by inductively coupled plasma optical emission spectrometry (ICP OES). A full factorial design with a central point was applied for

  • 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 …

  • Cloud point extraction and separation of copper and ...

     · A method is presented for the cloud-point extraction and separation of copper and lanthanoid ions. A water-soluble calixarene, p-sulfonatocalix[4]arene (C4AS), is used as the chelating agent and Triton X-100 is chosen as the surfactant. The factors affecting the extraction efficiency, such as pH, the concentrations of Triton X-100 and C4AS, equilibration time and centrifugation time, were ...

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