Spectrophotometric investigation of the complexation equilibria of zirconium(IV) withlawsone and determination of zirconium

1997 ◽  
Vol 128 (2) ◽  
pp. 147-156 ◽  
Author(s):  
H. Sedaira
Keyword(s):  
Spectrophotometric Investigation ◽  
Complexation Equilibria

Complexation equilibria between palladium(II) and 3-(4′,5′-dimethyl-2′-thiazolylazo)-2,6-diaminopyridine. Spectrophotometric determination of palladium

Polyhedron ◽  
1988 ◽  
Vol 7 (6) ◽  
pp. 495-499 ◽  
Author(s):  
MaJ. Sánchez ◽  
B. Santana ◽  
MaL.Pérez Pont ◽  
V. González ◽  
F.García Montelongo
Keyword(s):  
Spectrophotometric Determination ◽  
Complexation Equilibria

scholarly journals Complexation Equilibria and Spectrophotometric Determination of Iron(III) with Resorcylic Acid

2001 ◽  
Vol 84 (2) ◽  
pp. 537-545 ◽  
Author(s):  
Elham Y Hashem
Keyword(s):  
Spectrophotometric Determination ◽  
Dihydroxybenzoic Acid ◽  
Nitrogen Gas ◽  
Kinetic And Thermodynamic Parameters ◽  
Complexation Equilibria ◽  
Thermogravimetric Data ◽  
Differential Thermogravimetric Analysis ◽  
Complexation Reactions ◽  
Sensitive Method

Abstract The complexation equilibria of Fe(III) with resorcylic acid (2,4-dihydroxybenzoic acid, DHB) were studied spectrophotometrically in ethanol–water (4 + 6, v/v) at an ionic strength of 0.1M NaClO4. The complexation reactions were demonstrated and characterized. A simple, rapid, and sensitive method based on the formation of the Fe(III)–DHB complex at pH 2.5 (λmax = 520 nm, ε = 0.8 × 104 L/mol·cm) was developed for the spectrophotometric determination of Fe(III). The effect of diverse ions on the sensitivity of the proposed method was studied. The Fe–DHB complex was isolated and characterized by both elemental analysis and infrared spectroscopy. The thermal behavior of the complex in dynamic nitrogen gas was studied by thermogravimetric and differential thermogravimetric analysis. Thermal events encountered throughout the course of decomposition were monitored. A computer program was used for regression analysis and for determination of kinetic and thermodynamic parameters from experimental nonisothermal thermogravimetric data. The proposed method was tested by determinations of iron in various synthetic samples and Portland cement materials.

Complexation equilibria between niobium(V) and 4-(4′H-1′,2′,4′-triazolyl-3′-azo)-2-methylresorcinolExtraction—spectrophotometric determination of niobium in pyrochlore-bearing rocks

Talanta ◽  
1989 ◽  
Vol 36 (8) ◽  
pp. 831-836 ◽  
Author(s):  
Ma.J. Sánchez ◽  
A. Francisco ◽  
F. Jiménez ◽  
F.García Montelongo
Keyword(s):  
Spectrophotometric Determination ◽  
Complexation Equilibria

Spectroscopic Determination of Pressure-Induced Shifts in Inclusion Complexation Equilibria

1997 ◽  
Vol 69 (11) ◽  
pp. 2136-2142 ◽  
Author(s):  
Shirley M. Hoenigman ◽  
Christine E. Evans
Keyword(s):  
Inclusion Complexation ◽  
Spectroscopic Determination ◽  
Complexation Equilibria

Spectrophotometric Studies on the Complexation Equilibria of Ni and Pb with 2-Carboxy-2-Hydroxy-5'-Sulfo-Formazylbenzene. Simultaneous Determination of Trace Amounts of Ni and Pb

2004 ◽  
Vol 94 (78) ◽  
pp. 571-579 ◽  
Author(s):  
Elham Y. Hashem ◽  
Mohamed S. Abu-Bakr ◽  
Sawsan M. Hussain
Keyword(s):  
Simultaneous Determination ◽  
Complexation Equilibria

Spectrophotometric study of the complexation equilibria of zirconium(IV) with 1-amino-4-hydroxyanthraquinone and the determination of zirconium

The Analyst ◽  
1988 ◽  
Vol 113 (11) ◽  
pp. 1643 ◽  
Author(s):  
Kamal A. Idriss ◽  
Mohamed M. Seleim ◽  
Magda S. Saleh ◽  
M. S. Abu-Bakr ◽  
Hassan Sedaira
Keyword(s):  
Spectrophotometric Study ◽  
Complexation Equilibria

Spectrophotometric study of the complexation equilibria of uranium(VI) with 1,4-bis(4′-methylanilino)anthraquinone and determination of uranium(VI)

Polyhedron ◽  
1985 ◽  
Vol 4 (9) ◽  
pp. 1521-1526 ◽  
Author(s):  
K.A. Idriss ◽  
M.M. Seleim ◽  
M.S. Abu-Bakr ◽  
H. Sedaira
Keyword(s):  
Spectrophotometric Study ◽  
Complexation Equilibria
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