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001-es BibID:BIBFORM095758
Első szerző:Gáspár Attila (vegyész, kémikus)
Cím:Application of internal universal calibration for determination of fully dissociated species in capillary electrophoresis using indirect UV detection and electrokinetic injection / Attila Gáspár, Enikő Dudás
Dátum:2006
ISSN:0021-9673
Megjegyzések:Although the electrokinetic injection suffers from quantitation problems arising from mobility and matrix bias, the application of electrokinetic injection and indirect photometric detection may provide a very simple, sensitive and universal determination of fully dissociated components. In this work a survey of the possibilities of quantitative analysis using EK injection with indirect UV detection is given and a simple procedure (internal universal calibration) for accurate quantitative determination of traces using EK injection is proposed. It was shown that the thiosulfate as an internal universal standard (IUS) can be applied for quantitative determination of fully dissociated analytes (e.g. Br?, Cl?, NO2 ?, NO3?,SO42?, S2O32?) whose mobilities (migration times) do not differ from the mobilities of monitoring ion (chromate), counter-ion (potassium) and IUS with more than 10%. The proposed calibration procedure provides concentration data, which deviate generally less than 5% extent from the actual true values. The validity and the applicability of the method was studied in the analysis of samples containing different amount of matrix material.
Tárgyszavak:Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Capillary electrophoresis
Electrokinetic injection
Indirect UV detection
Internal universal calibration
Megjelenés:Journal of Chromatography A. - 1110 : 1-2 (2006), p. 254-260. -
További szerzők:Dudás Enikő
Pályázati támogatás:F040468
OTKA
3.2.1.-2004-04- 0032/3.0
GVOP
3.3.1-05/1.-2005-05-0004/3.0
GVOP
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