TRANSPORT-PROPERTIES OF ELECTRODIALYSIS MEMBRANES IN THE PRESENCE OF ARGININE .1. EQUILIBRIUM PROPERTIES OF A CATION-EXCHANGE MEMBRANE IN AN AQUEOUS-SOLUTION OF ARGININE CHLORHYDRATE AND SODIUM-CHLORIDE
J. Sandeaux et al., TRANSPORT-PROPERTIES OF ELECTRODIALYSIS MEMBRANES IN THE PRESENCE OF ARGININE .1. EQUILIBRIUM PROPERTIES OF A CATION-EXCHANGE MEMBRANE IN AN AQUEOUS-SOLUTION OF ARGININE CHLORHYDRATE AND SODIUM-CHLORIDE, Journal of membrane science, 89(1-2), 1994, pp. 73-81
Arginine is an amino acid which bears a positive electrical charge at
neutral pH. We studied the equilibrium properties of a cation exchange
membrane widely used in electrodialysis, the CMV Selemion membrane in
contact with aqueous solutions containing both sodium chloride and ar
ginine chlorhydrate. The water content of the membrane, the amount of
each ionic species present in the membrane and the individual mobiliti
es of sodium and arginine ions in the membrane were determined as a fu
nction of the arginine concentration (10(-3) to 10(-1) M) in the exter
nal aqueous solution. The last parameter was obtained by combining the
electric resistance and self-diffusion flux measurements. The mobilit
y of the sodium ion was lowered by the presence of arginine inside the
membrane material. This result was analysed taking into consideration
the variation of the water content in the membrane containing the ami
no acid.