Flotation-assisted dispersive liquid–liquid microextraction method for preconcentration and determination of trace amounts of cobalt: Orthogonal array design
- Авторы: Mohammadzadeh A.1, Ramezani M.1, Ghaedi A.2
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Учреждения:
- Department of Chemistry, Arak Branch
- Department of Chemistry, Gachsaran Branch
- Выпуск: Том 71, № 6 (2016)
- Страницы: 535-541
- Раздел: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/181744
- DOI: https://doi.org/10.1134/S1061934816060022
- ID: 181744
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Аннотация
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.
Об авторах
Ali Mohammadzadeh
Department of Chemistry, Arak Branch
Email: m-ramezani@iau-arak.ac.ir
Иран, Arak
Majid Ramezani
Department of Chemistry, Arak Branch
Автор, ответственный за переписку.
Email: m-ramezani@iau-arak.ac.ir
Иран, Arak
Abdolmohammad Ghaedi
Department of Chemistry, Gachsaran Branch
Email: m-ramezani@iau-arak.ac.ir
Иран, Gachsaran
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