Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples
A simple and efficient liquid-phase microextraction (LPME) technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry, for the extraction and determination of trace copper in water samples. 1-(2-Pyridylazo)-2-naphthol (PAN) was used as chelating agent. Microextraction efficiency factors (including extraction solvent type, extraction volume, time, temperature, and pH), the amount of the chelating agent, and salt effect were investigated and optimized. Under the optimum extraction conditions, figures of merit of the proposed method were evaluated. The calibration graph was linear in the range of 20–600 μg·L−1 with a detection limit of 0.76 μg·L−1. The relative standard deviation (R.S.D) for ten replicate measurements of 20 and 400 μg·L−1 of copper was 3.83% and 2.65%, respectively. Finally, the proposed method was applied to tap water, river water, and sea water, and accuracy was assessed through the analysis of certified reference water or recovery experiments.
Keywordsultrasound-assisted emulsification solidified floating organic drop microextraction flame atomic absorption spectrometry preconcentration copper
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- 3.Gao H W, Lu X Q, Ren J R. Cu(II)-3-(5-chlor-2-hydroxy-3-sulfophenylazo)-6-(2,4,6-tribromophenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic Acid-Co(II) binuclear complexation and its application to the selective determination of cobalt at ng/ml level. Analytical Sciences, 2005, 21(9): 1043–1049CrossRefGoogle Scholar
- 6.Demir Mulazimoglu A, Mulazimoglu I E, Ozkan E. Preconcentration with 1-nitroso-2-naphthol complexes on dowex MWC-1 resin: determination of Cu and Zn at trace level in drinking water samples by ICP-AES. E-Journal of Chemistry, 2009, 6(4): 1176–1180Google Scholar
- 7.Sreenivasa Rao K, Balaji T, Prasada Rao T, Babu Y, Naidu G R K. Determination of iron, cobalt, nickel, manganese, zinc, copper, cadmium and lead in human hair by inductively coupled plasma atomic emission spectrometry. Spectrochimica Acta Part B: Atomic Spectroscopy, 2002, 57(8): 1333–1338CrossRefGoogle Scholar
- 14.Bidabadi M S, Dadfarnia S, Shabani A M. Solidified floating organic drop microextraction (SFODME) for simultaneous separation/preconcentration and determination of cobalt and nickel by graphite furnace atomic absorption spectrometry (GFAAS). Journal of Hazardous Materials, 2009, 166(1): 291–296CrossRefGoogle Scholar
- 21.Dietz C, Sanz Landaluze J, Ximénez-Embún P, Madrid-Albarrán Y, Cámara C. Volatile organo-selenium speciation in biological matter by solid phase microextraction-moderate temperature multicapillary gas chromatography with microwave induced plasma atomic emission spectrometry detection. Analytica Chimica Acta, 2004, 501(2): 157–167CrossRefGoogle Scholar
- 28.Farahani H, Yamini Y, Shariati S, Khalili-Zanjani M R, Mansour-Baghahi S. Development of liquid phase microextraction method based on solidification of floated organic drop for extraction and preconcentration of organochlorine pesticides in water samples. Analytica Chimica Acta, 2008, 626(2): 166–173CrossRefGoogle Scholar