Measurement and Modeling of Mean Activity Coefficients of NaCl in an Aqueous Mixed Electrolyte Solution Containing Glycine

作者：Sheikholeslami Paniz; Dehghani M R^*; Safahieh Tina

来源：International Journal of Thermophysics, 2016, 37(8): 83.

DOI：10.1007/s10765-016-2088-3

• Activity coefficient
• Amino acids
• Ion-selective electrodes
• Mixed electrolyte solutions
• Modified Pitzer equation

An electrochemical cell with two ion-selective electrodes (Na+ glass) and (Cl- solid state) was used to measure the mean ionic activity coefficient of NaCl in an aqueous mixture containing NaCl, glycine, and NaNO3 at 308.15 K. The experiments were conducted at fixed molality of NaNO3 (0.1 m) and various molalities of glycine (0-1 m) and NaCl (up to 0.8 m). The experimental data were modeled using a modified version of the Pitzer equation. Finally the activity coefficient ratio of glycine was determined based on the Maxwell equation.

• 出版日期2016-8