"25310" . . "Journal of Chemical and Engineering Data" . "Ghasemi, Jahan" . "1" . . . "0021-9568" . "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" . "52" . "Peyman, H." . . "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"@en . . "1171-1178" . "Principal component analysis; Rank of matrix; Number of species; Stability constant, Spectrophotometric, SQUAD, EQUISPEC"@en . . "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 \u03B211 and log \u03B2111 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 \u03B211, log \u03B212, log \u03B2111 and log \u03B2121 for the system of PAR ("@en . "RIV/00216275:25310/07:00006295!RIV08-MSM-25310___" . "Studium vzniku komplex\u016F mezi 4-(2-Pyridylazo) resorcinolem a Al3+, Fe3+, Zn2+ a Cd2+ ionty ve vodn\u00FDch roztoc\u00EDch a 0.1M iontov\u00E9 s\u00EDle"@cs . "8"^^ . "[26F805D26328]" . "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"@en . "453234" . "3"^^ . . "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 \u03B211 and log \u03B2111 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 \u03B211, log \u03B212, log \u03B2111 and log \u03B2121 for the system of PAR (" . . "1"^^ . . "RIV/00216275:25310/07:00006295" . "Z(MSM0021627502)" . "Meloun, Milan" . . . . . . . "Studium vzniku komplex\u016F mezi 4-(2-Pyridylazo) resorcinolem a Al3+, Fe3+, Zn2+ a Cd2+ ionty ve vodn\u00FDch roztoc\u00EDch a 0.1M iontov\u00E9 s\u00EDle"@cs . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Studium vzniku komplex\u016F mezi 4-(2-Pyridylazo) resorcinolem a Al3+, Fe3+, Zn2+ a Cd2+ ionty ve vodn\u00FDch roztoc\u00EDch a 0.1M iontov\u00E9 s\u00EDle bylo provedeno spektrofotometricky. Vedle po\u010Dtu sv\u011Btlo-absorbuj\u00EDc\u00EDch \u010D\u00E1stic programem INDICES byly programem SQUAD a EQUISPEC stanoveny konstanty stability."@cs . . . "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" . . .