Flotation-assisted dispersive liquid–liquid microextraction method for preconcentration and determination of trace amounts of cobalt: Orthogonal array design
- Authors: Mohammadzadeh A.1, Ramezani M.1, Ghaedi A.2
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Affiliations:
- Department of Chemistry, Arak Branch
- Department of Chemistry, Gachsaran Branch
- Issue: Vol 71, No 6 (2016)
- Pages: 535-541
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/181744
- DOI: https://doi.org/10.1134/S1061934816060022
- ID: 181744
Cite item
Abstract
A simple, rapid, and efficient flotation-assisted dispersive liquid–liquid microextraction method was developed for preconcentration of trace amount of cobalt(II) ions. In this technique, a mixture of toluene and methanol (20: 80, v/v) was injected through the septum in the bottom of a narrow-bore tube containing cobalt solution. Afterwards, the fine droplets of extraction solvent were formed and cobalt (as 1-nitroso-2- naphtol complex) was collected on the surface of solution by aeration. The effect of different variables on the extraction efficiency of cobalt such as pH of solution, ligand concentration and injection volume was investigated using orthogonal array design. At optimum conditions, the calibration curve was linear over the range of 10–1000 μg/L. The detection limit, relative standard deviation and enrichment factor were 3 μg/L, 3.9% (n = 10) and 120, respectively. The developed method was successfully applied to the determination of cobalt in water and drug samples.
About the authors
Ali Mohammadzadeh
Department of Chemistry, Arak Branch
Email: m-ramezani@iau-arak.ac.ir
Iran, Islamic Republic of, Arak
Majid Ramezani
Department of Chemistry, Arak Branch
Author for correspondence.
Email: m-ramezani@iau-arak.ac.ir
Iran, Islamic Republic of, Arak
Abdolmohammad Ghaedi
Department of Chemistry, Gachsaran Branch
Email: m-ramezani@iau-arak.ac.ir
Iran, Islamic Republic of, Gachsaran
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