Determination of Arsenic in Drinking Water Samples by Electrothermal Atomic Absorption Spectrometry after Preconcentration Using the Biomass of Aspergillus niger Loaded on Activated Charcoal

Table 3

Effect of diverse ions on the preconcentration of As (5 μg/L As).

Ion	Tolerance limit; (𝐶ion/𝐶As)
Li^+, K^+, Na^+, Mg^2+, Ca^2+, Ba^2+	10000
NO3^−, SO4^2−, NO3^−, Cl^−	1000
Hg^+, Cd^2+, Cu^2+, Mn^2+, Pb^2+, Al^3+, Bi^2+	500
Zn^2+, Fe^2+, Fe^3+, Ni^2+,	100