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001-es BibID:	BIBFORM093111
Első szerző:	Škrlíková, Jana
Cím:	A novel, environmentally friendly dispersive liquid-liquid microextraction procedure for the determination of copper / Jana Škrlíková, Vasil Andruch, Ioseph S.Balogh, Lívia Kocúrová, Lajos Nagy, Yaroslav Bazeľ
Dátum:	2011
ISSN:	0026-265X
Megjegyzések:	A novel, simple and environmentally friendly procedure for copper determination has been developed. The method is based on the formation of an ion associate of Cu(I) with 1,3,3-trimethyl-2-[5-(1,3,3-trimethyl-1,3-dihydroindol-2-ylidene)-penta-1,3-dienyl]-3H-indolium (DIDC) in the presence of chloride ions as ligand, followed by dispersive liquid?liquid microextraction (DLLME) of the formed ion associate into organic phase and UV?Vis spectrophotometric detection. The following experimental conditions were used: pH 3, 0.24 mol L? 1 chloride ions, 0.06 mmol L? 1 DIDC. The effect of the nature of the extraction solvent, auxiliary solvent and disperser solvent used was studied. A mixture of amyl acetate, tetrachloromethane, and methanol in a 1:1:3 v/v/v ratio was selected for the DLLME procedure. The absorbance of the coloured extracts at 640 nm wavelength obeys Beer's law in the range 0.020?0.090 mg L? 1 of Cu. The limit of detection calculated from a blank test (n = 10) based on 3s is 0.005 mg L? 1 of Cu. The developed procedure was applied to the analysis of water samples. The suggested DLLME is compared with two procedures previously reported from our laboratory based on (1) conventional liquid?liquid extraction, and (2) sequential injection extraction performed in a dual-valve sequential injection system. The advantages and disadvantages of each method are discussed.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk UV-Vis spectrophotometry Copper
Megjelenés:	Microchemical Journal. - 99 : 1 (2011), p. 40-45. -
További szerzők:	Andruch, Vasil Balogh Ioseph S. Kocúrová, Lívia Nagy Lajos (1979-) (vegyész) Bazel, Yaroslav R.
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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