Impedance and voltammetry detection of bromate in food samples using NiPcMWCNTs modified glassy carbon electrode

Journal of Analytical Science and Technology

Table 6 Impact of interfering ions on bromate detection at NiPcMWCNTs/GCE

Interfering species	Initial R_ct (Ω)	Final R_ct (Ω)	% Drop of R_ct
K⁺	452.76	452.76	Nil
Cl⁻	452.76	452.76	Nil
CO₃²⁻	452.76	452.76	Nil
ClO₃⁻	452.76	452.76	Nil
Na⁺	452.76	452.70	0.01
SO₄²⁻	452.76	452.62	0.03
IO₃⁻	452.76	446.36	1.4
Mg²⁺	452.76	470.25	3.9

K⁺, Potassium ion; Cl⁻, Chloride ion, CO₃²⁻, Carbonate ion; ClO₃⁻, Chlorate ion; Na⁺, Sodium ion; SO₄²⁻, Sulphate ion; IO₃⁻, Iodate ion; and Mg²⁺, Magnesium ion