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The Study of Complex Formation Between 4-(2-Pyridylazo) Resorcinol and Al3+, Fe3+, Zn2+ and Cd2+ Ions in Aqueous Solution at 0.1M Ionic Strength
Authors: Meloun Milan | Ghasemi Jahan | Peyman H.
Year: 2007
Type of publication: článek v odborném periodiku
Name of source: Journal of Chemical and Engineering Data
Publisher name: American Chemical Society
Place: Washington
Page from-to: 1171-1178
Titles:
Language Name Abstract Keywords
cze Studium vzniku komplexů mezi 4-(2-Pyridylazo) resorcinolem a Al3+, Fe3+, Zn2+ a Cd2+ ionty ve vodných roztocích a 0.1M iontové síle Studium vzniku komplexů mezi 4-(2-Pyridylazo) resorcinolem a Al3+, Fe3+, Zn2+ a Cd2+ ionty ve vodných roztocích a 0.1M iontové síle bylo provedeno spektrofotometricky. Vedle počtu světlo-absorbujících částic programem INDICES byly programem SQUAD a EQUISPEC stanoveny konstanty stability. Metoda hlavních komponent, hodnost matice, počet částic, konstanty stability, spektrofotometrické, SQUAD, EQUISPEC
eng The Study of Complex Formation Between 4-(2-Pyridylazo) Resorcinol and Al3+, Fe3+, Zn2+ and Cd2+ Ions in Aqueous Solution at 0.1M Ionic Strength The complexation reactions between 4-(2-pyridylazo)resorcinol (PAR) and Al3+, Fe3+, Zn2+ and Cd2+ ions at 25oC and 0.1M ionic strength are performed spectrophotometrically. A critical comparison of the various PCA methods on the absorbance matrix data concerning the number of light absorbing species has been made. Knowing of the number of light absorbing species is a critical step for subsequent quantitative and qualitative all solution equilibria studies. Therefore, the nine selected index functions for the prediction of the number of light-absorbing components which contribute to a set of spectra are critically tested using the algorithms implemented in INDICES software. Behind the number of various complexes formed the stability constants of species ML and MLH type log β11 and log β111 for the system of PAR (ligand L) with Zn2+ and Cd2+ ions and the stability constants of species ML, ML2, MLH and ML2H type log β11, log β12, log β111 and log β121 for the system of PAR (ligand L) with Al3+ and Fe3+ ions at 25°C and 0.1M ionic strength and various mole-ratio are estimated by the SQUAD and EQUISPEC programs. Principal component analysis; Rank of matrix; Number of species; Stability constant, Spectrophotometric, SQUAD, EQUISPEC

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