Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Preconcenteration and Determination of Aluminum, Zinc, Copper and Manganese in Water Samples by Cloud Point Extraction and Chemometrics Methods

Document Type : Research Article

Authors
Sedigheh Ebadi 1
Elham Baher 2
Pooneh Ebrahimi 2
1 Department of Chemistry, Faculty of Sciences, Golestan University,Gorgan, I.R. IRAN
2 Department of Chemistry, Faculty of Sciences, Golestan University, Gorgan, I.R. IRAN
Abstract
The cloud point extraction method, based on separation in the micellar environment, was used for preconcentration of aluminum, zinc, copper, and manganese before measuring  by UV/Vis spectrophotometer. In this method, extraction of metals after complex information with the ligand of N-benzoyl-N-phenyl hydroxylamine was performed by two surfactants Triton X -100 and Sodium Dodecyl Sulphate (SDS). Each metal separately in the micellar medium was extracted. The effects of surfactant concentration Triton X -100 and sodium dodecyl Sulphate and ionic strength on the extraction yield were investigated using Box-Behnken experimental design and then the optimum condition was determined after searching point-to-point. Under optimum conditions, the detection limit for aluminum, manganese, zinc, and copper, respectively, 3.46, 3.08, 2.76, and 2.22 μg/L, and the relative standard deviation for six times for concentration of 300 micrograms per liter of zinc and copper was 3.02 and 3.12 percent respectively and for 500 micrograms per liter of aluminum and manganese samples were 3.93and 4.00 μg/L respectively. Preconcentration factors for aluminum, manganese, zinc, and copper were 3.6, 4.3, 4.5, and 5.0 respectively. Finally, measuring of these metals was successfully performed under optimal conditions for two real samples of water.
Keywords
Cloud point extraction
Box-Behnken experimental design
Triton X-100
Sodium dodecyl Sulphate
N-benzoyl-N-phenyl hydroxyl amine ligand
Subjects
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