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Table 2 Tolerance limits of some ions for terbium(III) sorption from aqueous solution of Transcarpathian clinoptilolite (concentration of Tb(III) – 1 μg∙mL−1; pH 8.25)

From: A solid-phase extraction method using Transcarpathian clinoptilolite for preconcentration of trace amounts of terbium in water samples

Species Tolerance limit (Cion/CTb(III))
NH4 +, NO3 2000
Na+, K+ 1500
Zn2+, Ca2+ 50
Cl 2500
Mg2+ 300
SO4 2− 1000