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Ultrasound-Assisted Supramolecular Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drops for Preconcentration of Palladium in Water and Road Dust Samples Publisher



Ezoddin M1 ; Majidi B2 ; Abdi K3
Authors
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Authors Affiliations
  1. 1. Department of Chemistry, Payame Noor University, P.O. Box 19395, 3697, Tehran, Iran
  2. 2. Education of Kurdistan Province, Saqqez, Iran
  3. 3. Department of Medicinal Chemistry and Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran

Source: Journal of Molecular Liquids Published:2015


Abstract

Abstract A novel ultrasonic-assisted supramolecular dispersive liquid-liquid microextraction based on solidification of a floating organic droplet (UASMDLLME-SFO) was proposed for the microextraction of Pd(II) prior to its determination by flame atomic absorption spectrometry (FAAS). A supramolecular solvent made up of reverse micelles of 1-dodecanol in tetrahydrofuran (THF) was injected into the aqueous sample solution. Reverse micelle coacervates were produced in situ through self-assembly processes. Sonication accelerated mass transfer of the target analyte into the supramolecular solvent phase. Some parameters such as type and volume of the extraction solvent, pH, volume of the disperser solvent, ultrasound extraction time, reagent concentration, and salt concentration were investigated. Under optimum conditions, a detection limit 0.63 μg L- 1 with preconcentration factor of 93 and the relative standard deviation (RSD, n = 10) 3.2% were achieved. The accuracy of the method was confirmed by analyses using the geological standard reference materials (GBW07291peridotite). The recoveries of the analytes in water and road dust samples were in the range of 96-104%. © 2015 Elsevier B.V.