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在NH_3·H_2O—NH_4Cl—三乙醇胺底液中Fe(Ⅲ)与PAN—S产生一灵敏的配合吸附波,峰电位在—0.50伏(vs.SCE)。峰电位与铁离子浓度在2.8×10~8～3.4×10~(-6)mol/L范围内线性良好,检出下限可达2.8×10~(-8)mol/L。该法用于乳粉、头发、血清等样品的测定,结果满意。
In the NH_3 · H_2O-NH_4Cl-triethanolamine solution, Fe (Ⅲ) and PAN-S produced a sensitive adsorption wave with a peak potential of -0.50 V (vs.SCE). The peak potentials and ferric ion concentrations were good in the range of 2.8 × 10 ~ 8 ~ 3.4 × 10 ~ (-6) mol / L with the detection limit of 2.8 × 10 ~ (-8) mol / L. The method is used for the determination of milk powder, hair, serum and other samples with satisfactory results.