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Issue 27, 2016
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Application of supramolecular solvent-based dispersive liquid–liquid microextraction for trace monitoring of lead in food samples

Ayoob Rastegar,a  Ahmad Alahabadi,a  Ali Esrafili,*b  Zahra Rezai,a  Ahmad Hosseini-Bandegharaeiac  and  Shahram Nazarid 
Author affiliations

* Corresponding authors

a Department of Environmental Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran

b Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
E-mail: a_esrafily@yahoo.com
Tel: +98 21 88607939

c Department of Engineering, Islamic Azad University, Kashmar Branch, Kashmar, Iran

d Department of Environmental Health, School of Public Health, Qom University of Medical Sciences, Qom, Iran

Abstract

In this study, an efficient sample treatment method based on supramolecular solvent-based dispersive liquid–liquid microextraction (SM-DLLME) was applied for trace monitoring of lead by flow injection flame atomic absorption spectrometry. A supramolecular solvent comprising reverse micelles of 1-decanol in tetrahydrofuran (THF) was created by injection of these solvents into the aqueous sample solution. After injection of 1-decanol : THF mixtures into the sample solution, nanomicelles were produced in an ultrasonic bath and the lead–dithizone complex was extracted to the supramolecular phase at optimized pH. The solution was centrifuged and the metal complex formed was extracted into the supramolecular solvent phase. The detection limit for lead ions was 0.4 μg L−1 under the optimized separation conditions. The relative standard deviations for six extraction analysis of 3, 10 and 100 μg L−1 of lead ions were 4.8%, 4.5% and 4.1%. Finally, SM-DLLME was successfully applied for trace monitoring of lead ions in agricultural and food samples.

Graphical abstract: Application of supramolecular solvent-based dispersive liquid–liquid microextraction for trace monitoring of lead in food samples

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Publication details

The article was received on 21 May 2016, accepted on 28 May 2016 and first published on 01 Jun 2016


Article type: Paper
DOI: 10.1039/C6AY01463A
Citation: Anal. Methods, 2016,8, 5533-5539
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    Application of supramolecular solvent-based dispersive liquid–liquid microextraction for trace monitoring of lead in food samples

    A. Rastegar, A. Alahabadi, A. Esrafili, Z. Rezai, A. Hosseini-Bandegharaei and S. Nazari, Anal. Methods, 2016, 8, 5533
    DOI: 10.1039/C6AY01463A

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