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Table 2 Effects of the matrix ions on the recoveries of the examined metal ions.

From: Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples

  Potentially interfering ion/analyte fold ratio
Added salt Potentiall
interfering species
Cu(II) Ni(II) Cd(II) Cr(III)
NaCl Na+, 12000 12000 12000 10000
KCl K+, 12000 12000 12000 10000
NaCl Cl- 12000 12000 12000 10000
Na2SO4 SO42- 12000 12000 12000 10000
NaNO3 NO3- 12000 12000 12000 10000
C6Na3H5O7.2H2O C6H5O73- 12000 12000 12000 10000
C4Na2H4O6.2H2O C4H4O62- 12000 12000 12000 10000
Na2C2O4 C2O42- 12000 12000 12000 10000
Na2CO3 CO32- 12000 12000 12000 10000
Ca3(PO4)2 PO43- 12000 10000 10000 10000
NH4Cl NH4+ 500 400 300 300
Ca3(PO4)2 Ca2+ 500 400 300 300
BaCl2 Ba2+ 12000 10000 10000 10000
MgCl2 Mg2+ 12000 10000 10000 10000
Al(NO3)3 Al3+ 12000 12000 12000 12000
Mn(NO3)2 Mn2+ 12000 12000 12000 12000
Co(NO3)2 Co2+ 100 70 100 100
Zn(NO3)2 Zn2+ 100 70 100 100
FeCl3 Fe3+ 80 70 25* 50
Humic acid Humic acid 50 65 70 60
Fulvic acid Fulvic acid 55 50 45 45
  1. * Mask with F-.