Separation and Preconcentration of Trace Amounts of Manganese and Nickel from Natural Water Samples by a Diimine Derivative Schiff Base-Coated Silica-Gel Minicolumn

Table 3

Tolerance limits for coexisting ions on the recovery of 25 𝜇g L⁻¹ Mn (II) and Ni (II).

Coexisting ions	Ion/target ions ratio (w/w)
Na^+, K^+, Li^+	2000
Sr^2+, Sc^3+, Rh^3+	87
Ca^2+, Ba^2+, Be^2+, Pd^2+	80
ClO4^−, Zn^2+, Fe^3+, Cd^2+	50
Pb^2+	30
Co^2+, Ag^+, Mg^2+	20
Al^3+	15
Cr^3+	10
Hg^2+	8
Cu^2+	3