cloud point extraction of pper

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

15.02.2007 Cloud point methodology was successfully employed for preconcentration of trace copper, zinc, iron, and nickel prior to their determination by flame atomic absorption spectrometry (FAAS). The metals react with 2-phenyl-1H-benzo[d] imidazole (PHBI) in a surfactant Triton X-114 medium. The effects of analytical parameters including pH, amounts of reagents etc. were investigated on the

Cited by: 58

Cloud point extraction and flame atomic absorption ...

Cloud point extraction was used with lipophilic Schiff base N,N′-bis(2-hydroxyacetophenone)-1,2-propanediimine (L) as a pre-concentration step prior to flame atomic absorption spectrometry determination of trace amounts of copper in water samples.The process is based upon the formation of Cu(II)/L complexes soluble in a micellar phase composed by the non-ionic surfactant Triton X-114.

Cited by: 64

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

10.03.2003 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.

Cited by: 105

Determination of cadmium, copper, lead and zinc in water ...

Cloud point extraction (CPE) has been used for the simultaneous pre-concentration of cadmium, copper, lead and zinc after the formation of a complex with 1- (2-thiazolylazo)-2-naphthol (TAN), and later analysis by flame atomic absorption spectrometry (FAAS) using octylphenoxypolyethoxyethanol (Triton X-114) as surfactant.

Cited by: 418

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.

Cited by: 3

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

The extraction process is based on the formation of a hydrophobic complex of copper(II)−H2L, which is subsequently extracted into the nonionic surfactant p-octylpolyethyleneglycolphenylether (Triton X-100) rich phase at a temperature above the cloud point temperature (CPT).

Cited by: 19

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

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.

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

The cloud point extraction of copper(II) with monocarboxylic acids into non-ionic surfactant phase Author links open overlay panel S.A Kulichenko V.O Doroschuk S.O Lelyushok Show more

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

Cloud point methodology was successfully employed for preconcentration of trace copper, zinc, iron, and nickel prior to their determination by flame atomic absorption spectrometry (FAAS). The metals react with 2-phenyl-1H-benzo[d] imidazole (PHBI) in a surfactant Triton X-114 medium. The effects of analytical parameters including pH, amounts of reagents etc. were investigated on the recoveries ...

Cloud point extraction for the determination of copper ...

11.02.2008 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 methanol was added to the surfactant-rich phase

Cloud point extraction of copper, lead, cadmium, and

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. The surfactant-rich phase was diluted with 1 M ...

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

Development of a Cloud-Point Extraction Method for

Cloud-point extraction (CPE) is probably the most versatile and simple method for the preconcentration and extraction of hydrophobic species from water. The technique is based on the property of most nonionic surfactants in aqueous solutions to form micelles and become turbid when heated to a temperature known as the cloud point temperature (CPT). Above this temperature, the micellar

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 the calibration curves were higher than 0.999. The effects of matrix ions (cations and anions) on the recovery of copper were studied systematically. The use of flame atomic absorption spectrometry with certified reference ...

Cloud Point Extraction - an overview ScienceDirect Topics

Cloud point extraction (CPE) is one of the most promising, environmentally friendly, energy-saving processes for aqueous effluent purification. Among other advantages, it appears to be an answer to the current restricted use of organic solvents (volatile organic compounds, VOC), often toxic, on a large scale. In fact, in water/polyethoxylated non-ionic surfactant systems, the existence of a ...

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.