Revised Ion Exchange Method for Estimation of Conditional Stability Constants of Metal−Dendrimer Complexes

2006 ◽  
Vol 45 (22) ◽  
pp. 7380-7387 ◽  
Author(s):  
Yinhui Xu ◽  
Dongye Zhao
Keyword(s):  
Ion Exchange ◽  
Stability Constants ◽  
Conditional Stability ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Conditional Stability Constants

The Ion-exchange Behaviour of Beryllium Salicylate Complexes

1963 ◽  
Vol 16 (3) ◽  
pp. 376
Author(s):  
HJ de Bruin ◽  
JJ Fardy ◽  
RB Temple
Keyword(s):  
Ionic Strength ◽  
Ion Exchange ◽  
Stability Constants ◽  
Conditional Stability ◽  
Conditional Stability Constants ◽  
Exchange Behaviour ◽  
Chelate Rings

The beryllium/salicylate system has been re-examined by ion-exchange procedures. The results appear to confirm the existence of a neutral 1 : 1 and an anionic 1 : 2 complex, in both of which the salicylate radicals form chelate rings. Conditional stability constants have been measured at 25�C at an ionic strength of 0.15, the values obtained being ������������� β1 = 4.97 x 1012, and β2 = 2.63 x 1022.

Measurement of Complexing Materials Excreted from Algae and Their Ability to Ameliorate Copper Toxicity

1979 ◽  
Vol 36 (8) ◽  
pp. 901-905 ◽  
Author(s):  
C. M. G. Van den Berg ◽  
P. T. S. Wong ◽  
Y. K. Chau
Keyword(s):  
Stability Constants ◽  
Copper Complexes ◽  
Copper Toxicity ◽  
Copper Ion ◽  
Ion Concentration ◽  
Conditional Stability ◽  
Exchange Method ◽  
Ionic Copper ◽  
Conditional Stability Constants ◽  
Algal Exudates

The complexing capacities of three algal exudates and the conditional stability constants of their copper complexes have been determined by an ion exchange method. Their ability to ameliorate copper toxicity towards the primary production of Chlorella vulgaris is related to the conditional stability constants, which regulate the ionic copper concentration. Anabaena cylindrica, Navicula pelliculosa, and Scenedesmus quadricauda excreted 6.73, 2.86, and 0.66 μmol/L of complexing ligands, respectively, with conditional stability constants of 107.7, 108.1, and 108.6, respectively, for their corresponding copper complexes. When these constants were applied in calculations, a free copper ion concentration of 10−10.3 mol/L was found in each exudate. Key words: algal exudates, free copper ion concentration, complexing capacity, copper ion toxicity, primary productivity

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