scholarly journals MULTIVARIATE SPECTROPHOTOMETRIC ANALYSIS OF CERTAIN ANTIHYPERTENSIVE BINARY MIXTURES

2003 ◽  
Vol 26 (1) ◽  
pp. 5-13
Author(s):  
Abd El-Maaboud Mohamed ◽  
Samiha Hussein ◽  
Hanaa Abdel-Wadood
Keyword(s):  
Binary Mixtures ◽  
Spectrophotometric Analysis

Spectrophotometric Analysis of Binary Mixtures of Sulfonamides

1979 ◽  
Vol 62 (1) ◽  
pp. 67-70
Author(s):  
Abdel-Aziz Wahbi ◽  
Hassan Abdine ◽  
Mohamed Korany ◽  
Fawzi El-Yazbi
Keyword(s):  
Orthogonal Polynomials ◽  
Binary Mixtures ◽  
Curve Fitting ◽  
Relative Concentration ◽  
Quadratic Function ◽  
Quadratic Equation ◽  
Spectrophotometric Analysis ◽  
Absorbance Ratio ◽  
Sulfacetamide Sodium

Abstract Different methods for analyzing binary mixtures by using 2 wavelengths are reviewed. The absorbance ratio calculated at 2 wavelengths, not including the isoabsorptive point, was a quadratic function of relative concentration. The curve-fitting process using orthogonal polynomials was applied to obtain the quadratic equation. An absorbance ratio can be used as a rapid purity index for sulfacetamide sodium in the presence of sulfanilamide. Sulfacetamide sodium has been determined in eye drop preparations.

Spectrophotometric Analysis of Binary Mixtures of Antazoline and Naphazoline

1978 ◽  
Vol 67 (1) ◽  
pp. 140-141 ◽  
Author(s):  
A.M. Wahbi ◽  
H. Abdine ◽  
M.A. Korany ◽  
F.A. El-Yazbi
Keyword(s):  
Binary Mixtures ◽  
Spectrophotometric Analysis

THE ADSORPTION OF VITAMIN A BY SODIUM BENTONITE

1954 ◽  
Vol 32 (1) ◽  
pp. 610-620 ◽  
Author(s):  
D. H. Laughland ◽  
W. E. J. Phillips
Keyword(s):  
Vitamin A ◽  
Organic Solvent ◽  
Binary Mixtures ◽  
Satisfactory Agreement ◽  
Physical Adsorption ◽  
Spectrophotometric Analysis ◽  
Adsorption Complex ◽  
Blue Color ◽  
Sodium Bentonite ◽  
Triene Conjugation

A study has been made of the reaction whereby a blue adsorption complex is formed when an organic solvent solution of vitamin A is added to sodium bentonite. In addition to a physical adsorption of the vitamin on sodium bentonite a chemical alteration occurs in the vitamin A molecule which results in the formation of anhydro vitamin A. The adsorbed material may be removed from the sodium bentonite by extraction with diethyl ether but the blue color is dissipated and a secondary reaction product is formed. This latter compound exhibits the characteristics of triene conjugation and exhibits maximum absorption at about 290 mμ. Equations have been developed for the spectrophotometric analysis of the binary mixtures encountered in the reaction and satisfactory agreement has been obtained between calculated and observed values.

THE ADSORPTION OF VITAMIN A BY SODIUM BENTONITE

1954 ◽  
Vol 32 (6) ◽  
pp. 610-620 ◽  
Author(s):  
D. H. Laughland ◽  
W. E. J. Phillips
Keyword(s):  
Vitamin A ◽  
Organic Solvent ◽  
Binary Mixtures ◽  
Satisfactory Agreement ◽  
Physical Adsorption ◽  
Spectrophotometric Analysis ◽  
Adsorption Complex ◽  
Blue Color ◽  
Sodium Bentonite ◽  
Triene Conjugation

A study has been made of the reaction whereby a blue adsorption complex is formed when an organic solvent solution of vitamin A is added to sodium bentonite. In addition to a physical adsorption of the vitamin on sodium bentonite a chemical alteration occurs in the vitamin A molecule which results in the formation of anhydro vitamin A. The adsorbed material may be removed from the sodium bentonite by extraction with diethyl ether but the blue color is dissipated and a secondary reaction product is formed. This latter compound exhibits the characteristics of triene conjugation and exhibits maximum absorption at about 290 mμ. Equations have been developed for the spectrophotometric analysis of the binary mixtures encountered in the reaction and satisfactory agreement has been obtained between calculated and observed values.

Thermodynamic properties of binary mixtures containing thiaalkanes

1980 ◽  
Vol 77 ◽  
pp. 445-449 ◽  
Author(s):  
Zohra Ferhat-Hamida ◽  
Robert Philippe ◽  
Jean-Claude Merlin ◽  
V. Kehiaian
Keyword(s):  
Thermodynamic Properties ◽  
Binary Mixtures
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