Potentiometric Determination of Effective Complex Formation Constants of Lipophilic Ion Carriers within Ion‐Selective Electrode Membranes

1997 ◽  
Vol 144 (5) ◽  
pp. L125-L127 ◽  
Author(s):  
Eric Bakker ◽  
Ernö Pretsch
Keyword(s):  
Complex Formation ◽  
Formation Constants ◽  
Ion Selective Electrode ◽  
Potentiometric Determination ◽  
Selective Electrode ◽  
Complex Formation Constants

Comparison of calcium complexation of some carboxylic acids derived from D­glucose and D-fructose

1995 ◽  
Vol 73 (8) ◽  
pp. 1338-1347 ◽  
Author(s):  
Hélène Bazin ◽  
Gérard Descotes ◽  
Alain Bouchu ◽  
Michelle Petit-Ramel
Keyword(s):  
Molecular Structure ◽  
Complex Formation ◽  
Carboxylic Acids ◽  
Formation Constants ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Complex Formation Constants ◽  
Calcium Complexation ◽  
C Nmr

The aim of this work was to compare calcium sequestering behaviour of 11 carboxylic acids derived from carbohydrates, and to study the influence of molecular structure on the calcium complexation. For this purpose, various carboxylic acids derived from methyl D-glucopyranoside, methyl D-fructopyranoside, and methyl D-fructofuranoside were synthesized and studied using an ion selective electrode to determine calcium complex formation constants. Complexation sites of carbohydrate skeletons were determined using 13C NMR. Keywords: Ca(II) complexation, carboxylic acids, fructofuranosides, fructopyranosides, glucopyranosides.

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