Protonation Equilibria of Carminic Acid and Stability Constants of Its Complexes with Some Divalent Metal Ions in Aqueous Solution

2012 ◽  
Vol 41 (5) ◽  
pp. 793-803 ◽  
Author(s):  
Hasan Atabey ◽  
Hayati Sari ◽  
Faisal N. Al-Obaidi
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Stability Constants ◽  
Divalent Metal ◽  
Carminic Acid ◽  
Divalent Metal Ions ◽  
Protonation Equilibria

Selective Aggregation of Polyanion-Coated Gold Nanorods Induced by Divalent Metal Ions in an Aqueous Solution

2010 ◽  
Vol 10 (5) ◽  
pp. 3538-3542 ◽  
Author(s):  
Young In Yang ◽  
Inhee Choi ◽  
Surin Hong ◽  
Suseung Lee ◽  
Taewook Kang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Gold Nanorods ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Selective Aggregation

Stability constants and spectral studies of complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid with some divalent metal ions

1984 ◽  
Vol 62 (11) ◽  
pp. 2299-2301
Author(s):  
C. Mahalingam ◽  
J. K. Sthapak ◽  
D. D. Sharma ◽  
R. L. Tiwari ◽  
Smita Sthapak
Keyword(s):  
Carboxylic Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Divalent Metal ◽  
Reflectance Spectra ◽  
Spectral Studies ◽  
Divalent Metal Ions ◽  
The Stability

The stability constants of metal complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid have been determined spectrophotometrically. These follow the Irving–Williams sequence: log KOH(H) = 10.67, log K1(Co) = 9.02, log K1(Ni) = 9.68, log K1(Cu) = 13.37, log K1(Zn) = 7.58, and [Formula: see text]The chelates of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and [Formula: see text] with the dye have been prepared and characterized on the basis of their ir and reflectance spectra.

Formation constants for magnesium and calcium citrate complexes

1980 ◽  
Vol 33 (7) ◽  
pp. 1511 ◽  
Author(s):  
KN Pearce
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Metal Ions ◽  
Formation Constants ◽  
Potassium Citrate ◽  
Divalent Metal ◽  
Calcium Citrate ◽  
Divalent Metal Ions ◽  
Citrate Complex

centration formation constants for magnesium and calcium citrate complexes have been redetermined from pH titrations of citric acid in the absence and presence of the divalent metal ions in aqueous solution at 2° Values for the constants, corrected for the presence of potassium citrate complex, are presented and critically compared with literature values. Values for the formation constants of strontium and barium citrate complexes are also reported.

Studies on some divalent metal α-isosaccharinic acid complexes

2006 ◽  
Vol 94 (6-7) ◽  
Author(s):  
Peter Warwick ◽  
Nick Evans ◽  
Sarah Vines
Keyword(s):  
Radioactive Waste ◽  
Metal Ions ◽  
Stability Constants ◽  
Detrimental Effect ◽  
Divalent Metal ◽  
Intermediate Level ◽  
Divalent Metal Ions ◽  
Organic Complexes ◽  
Intermediate Level Radioactive Waste ◽  
Isosaccharinic Acid

SummaryThe presence of organic complexants, such as α-isosaccharinic acid (ISA) in an intermediate-level radioactive-waste (ILW) repository may have a detrimental effect on the sorption of radionuclides by forming organic complexes in solution. To assess this, stability constants are required for the complexes formed. Constants have been determined for the divalent metal ions, Cd

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