Protonation and complex formation of 5-sulfosalicylate in NaCl, CaCl2 and MgCl2 aqueous media. Speciation in synthetic seawater.
The binding capacity of 5-sulfosalicylic acid (ssa) towards cationic macro-components of natural waters has been investigated in different ionic media (NaCl, MgCl2 and CaCl2 aqueous solutions) and in the ionic strength range 0 < or = I < or = 1 mol dm-3. In order to contribute to the speciation of this multi-sites ligand, measurements have been carried out also in a synthetic seawater (SSWE) containing the major components of seawater (Na+, K+, Ca2+, Mg2+, Cl- and SO4(2-)). Measurements have been performed by potentiometry ([H+]-glass electrode), at t = 25 degrees C. A critical analysis on the experimental and literature data is also given.
Foti
Claudia
C
Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica dell'Università, Salita Sperone 31, I-98166, Messina, Italy.
Gianguzza
Antonio
A
Orecchio
Santino
S
Piazzese
Daniela
D
D001557:Benzenesulfonates; D002122:Calcium Chloride / Q000737:chemistry; D006801:Humans; D017736:Ion-Selective Electrodes; D015636:Magnesium Chloride / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry*; D012623:Seawater / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D001557:Benzenesulfonates; D012459:Salicylates; D015636:Magnesium Chloride; D012965:Sodium Chloride; C003366:sulfosalicylic acid; D002122:Calcium Chloride