1. Li + LiCl (3.6) 1.95 (2) 2.52 (2) 6.0 (5) Howell & Neilson (1996) LiCl (1) 1.96 (2) 2.52 (2) 6.5 (10)
2. Na + NaClO 4 (4) 2.4 (2) ---------- 4.9 (10) Skipper & Neilson (1989)
3. K + KCl (4) 2.9-3.4 5.3 (6) Neilson & Skipper (1985)
4. Rb + RbCl (4) 3.1 6.9 Ramos et al . (2000b)
5. Cl - NiCl 2 (2) 3.1 (1) 2.28 (3) 6.4 (3) Powell et al . (1993)