title: A simple and rapid new dispersive liquid-liquid microextraction based on solidification of floating organic drop combined with inductively coupled plasma-optical emission spectrometry for preconcentration and determination of aluminium in water samples.
abstract: A new dispersive liquid-liquid microextraction method based on solidification of floating organic drop (DLLME-SFO) combined with inductively coupled plasma-optical emission spectrometry (ICP-OES) was developed for the determination of aluminium. An appropriate mixture of acetone and 1-undecanol was injected rapidly into the aqueous sample containing aluminium-morin complex and as a result cloudy mixture was formed. After centrifugation, the test tube was cooled for 5 min. The solidified 1-undecanol on top of the solution was transferred into a suitable vial. Then, 100 microL of it was dissolved in 100 microL of 1-propanol and finally injected into the ICP-OES. Under the optimum conditions, the enhancement factor of 128 was obtained for only 20.0 mL of the water sample. The calibration graph was linear in the range of 1.0-250.0 microg L(-1) with the limit of detection of 0.8 microg L(-1). The relative standard deviation (RSD) for five replicate measurements of aluminium was 4.5%.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Rezaee
authors.forename: Yadollah
authors.initials: Y
authors.lastname: Yamini
authors.forename: Alireza
authors.initials: A
authors.lastname: Khanchi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Faraji
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Saleh
mesh_terms: D000465:Algorithms; D000535:Aluminum / Q000032:analysis*; D002138:Calibration; D002498:Centrifugation; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D009930:Organic Chemicals / Q000032:analysis; D012015:Reference Standards; D012997:Solvents; D013054:Spectrophotometry, Atomic; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*; D047309:Flavones
chemical_list: D000535:Aluminum; D005419:Flavonoids; D007202:Indicators and Reagents; D009930:Organic Chemicals; D012997:Solvents; D014874:Water Pollutants, Chemical; C008548:morin; D047309:Flavones