شماره ركورد كنفرانس :
3834
عنوان مقاله :
THERMODYNAMIC STUDY OF THE (CaCl2 + Ca(NO3)2 + L-GLUTAMINE + H2O) SYSTEM USING POTENTIOMETRIC MEASUREMENTS
پديدآورندگان :
Ghalami-Choobar Bahram b-ghalami@guilan.ac.ir Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran; , Shafaghat-Lonbar Mojgan Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
كليدواژه :
Activity coefficient , Potentiometric measurements , CaCl2 , Ca(NO3)2 , L , glutamine , Pitzer model
عنوان كنفرانس :
نوزدهمين سمينار شيمي فيزيك ايران
چكيده فارسي :
In this work, the thermodynamic properties of the quaternary (CaCl2 + Ca(NO3)2 + L-glutamine + H2O) system, using the potentiometric method, were reported. The potentiometric measurements were performed in mixed solvent systems containing 2.5% mass fraction of L-glutamine, over total ionic strengths from 0.0100 mol.kg−1 to 4.0000 mol.kg−1 at T = 293.2 K and P= 0.1 MPa. The Ca−ISE was prepared in our laboratory using the ionophore treated by carbon nanotubes. The Pitzer ion interaction model was used to correlate the experimental data. The unknown parameters were evaluated. There is a good consistency between the experimental results and Pitzer model.
