Table 3 Effect of interferences ions on preconcentration and determination of heavy metal ions

Ca²⁺, Mg²⁺, Na⁺, K⁺, Ni²⁺

Na⁺, K⁺, Mn²⁺, Ca²⁺

Na⁺, K⁺, Ca²⁺

K⁺, Na⁺, Fe³⁺

K⁺, Na⁺, NH₄ ⁺

650

Ni²⁺, Mn²⁺, Cu²⁺, Fe³⁺

Pb²⁺, NO₃ ⁻, Mg²⁺, NH₄ ⁺

Mn²⁺, Cd²⁺, Pb²⁺, Fe³⁺

Mn²⁺, NO₃ ⁻, NH₄ ⁺, Mg²⁺

Mn²⁺, Ni²⁺, Cu²⁺, NO₃ ⁻,

550

Cr³⁺, Zn²⁺, Cd²⁺

Ni²⁺, Hg²⁺, Ba²⁺, Cr³⁺, Zn²⁺, CH₃COO⁻

Mg²⁺, Cu²⁺, NO₃ ⁻, NH₄ ⁺

Ca²⁺, Pb²⁺, Zn²⁺, Hg²⁺, Cu²⁺

Ca²⁺, Mg²⁺, Fe³⁺, Zn²⁺, Hg²⁺

400

Co²⁺, NH₄ ⁺, Ba²⁺

C₂O₄ ²⁻, SO₄ ²⁻, Co²⁺, Fe³⁺

Cr³⁺, Zn²⁺, Hg²⁺, Ba²⁺, Co²⁺

Ni²⁺, Co²⁺, Br⁻

Pb²⁺, Co²⁺, Ba²⁺, C₂O₄ ²⁻, CH₃COO⁻

250

Hg²⁺, NO³⁻, CH₃COO⁻

Br⁻

C₂O₄ ²⁺, Br⁻

C₂O₄ ²⁻, Ba²⁺

SO₄ ²⁻, Br⁻

150

SO₄ ²⁻, Br⁻, C₂O₄ ²⁻

CH₃COO⁻, SO₄ ²⁻

SO₄ ²⁻, CH₃COO⁻

100