Analyte: Weak Anion, pKa 5.0
R-COOH R-COO- R-COO-
R-COOH R-COO- R-COO- Sorbent: SAX
R-NR3+ R-NR3+ R-NR3+
R-NR3+ R-NR3+ R-NR3+Analyte: Strong Anion
R-SO3- R-SO3- R-SO3-
R-SO3- R-SO3- R-SO3-
Sorbent: SAX R-NR3+ R-NR3+ R-NR3+
R-NR3+ R-NR3+ R-NR3+pH 3
pH 7
pH 11
Strong
Anion Exchange (SAX)