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Table 3 Tolerance limits for interferences in determination of 50.0 μg L−1 Cu(II) ions

From: Determination of copper(II) by flame atomic absorption spectrometry after its perconcentration by a highly selective and environmentally friendly dispersive liquid–liquid microextraction technique

Foreign species Tolerated ratio (Wspecies/WCu(II))
NO3, Cl, BrO3, ClO4, S2O82−, Cr3+, Cr6+, Mn2+, Li+, Co2+, K+, Al3+, Pd2+, Ni2+, Ag+ 5000
PO43−, IO4, F, SO32−, citrate, S2O52−, SCN, CN, HCOO, acetate, CO32−, C2O42−, Ba2+, Zn2+, Fe2+, Fe3+ 1000
ClO3, NO2, Cd2+ 500
Hg2+ 100
Sn2+, Pb2+ 10