Investigation of the Interaction of Sodium Chloride and Two Amino Sulfonic Acids, HEPES and MOPSO, by EMF Measurements.
Ionic interactions in the two systems NaCl-HEPES (N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid) and NaCl-MOPSO (3-(N-Morpholino)-2-hydroxypropanesulfonic acid) have been studied in terms of their mutual influence on the respective activity coefficients of each component. Activity coefficients for each component of the two systems and for corresponding buffers are calculated from emf measurements of solutions containing NaCl, the aminosulfonic acid, and its conjugate base in a NalSE/solution/AgCl-Ag cell at 5, 15, 25, and 37 °C.
National Institute of Standards and Technology, Gaithersburg, MD 20899.
Y C
YC
Wu
National Institute of Standards and Technology, Gaithersburg, MD 20899.
Darning
D
Feng
National Institute of Standards and Technology, Gaithersburg, MD 20899.
W F
WF
Koch
HEPES; MOPSO; activity coefficient; amino acid; emf; salt interaction; sodium chloride