Determination of stability constants of complexes of neutral analytes with charged cyclodextrins by affinity capillary electrophoresis

2012 ◽  
Vol 33 (6) ◽  
pp. 1032-1039 ◽  
Author(s):  
Martin Beneš ◽  
Iva Zusková ◽  
Jana Svobodová ◽  
Bohuslav Gaš
Author(s):  
Viktoria V. Sursyakova ◽  
Vladimir A. Levdansky ◽  
Anatoly I. Rubaylo

Inclusion complexes of ester betulin derivatives (pentacyclic lupane triterpenoids) with β-cyclodextrin (β-CD) were studied by affinity capillary electrophoresis. Stability constants were calculated from dependencies of viscosity-corrected effective electrophoretic mobilities on β-CD concentration (0-10 mM) in background electrolytes using nonlinear regression fitting. Logarithms of stability constants at 25 °C for 1:1 and 1:2 β-CD complexes of betulin 3,28-diphthalate, betulin 3,28-disuccinate and betulin 3,28-disulfate (95 % confidence interval) are 4.25 (4.16-4.32) and 7.27 (6.73-7.50), 4.38 (4.26-4.48) and 7.58 (6.90-7.84), 4.04 (4.00-4.08) and 5.91 (4.60-6.20), respectively


1986 ◽  
Vol 103 (2) ◽  
pp. 325-332 ◽  
Author(s):  
M.C.García Alvarez-Coque ◽  
R.M.Villanueva Camaãs ◽  
G.Ramis Ramos ◽  
M.J.Medina Hernández ◽  
C.Mongay Fernández

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