A Novel Carbon Paste Electrode Modified with N¹-Hydroxy-N¹,N²-Diphenylbenzamidine for the Electrochemical Determination of Cadmium(II) in Environmental Samples

Table 2

Change in current response of 5.0 × 10⁻⁸ M Cd(II) in the presence of other ions.

Interfering ion	Concentration (M)	Change of current (%) of Cd(II)
K^+, Na^+, Ca^2+, Mg^2+, NH4^+, Cl^− and NO3^-	5.0 × 10^−6	4.51
Ni^2+ and SO4^2-	1.5 × 10^−6	3.96
Fe^3+, Hg^2+ and Co^2+	1.0 × 10^−6	−4.34
Pb^2+	5.0 × 10^−7	−3.60
Cu^2+	3.5 × 10^−7	−4.24