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研究了Zr 桑色素络合物在碳糊电极正电位区的吸附伏安行为 ,并利用其在 0 .74V处的二次导数吸附氧化峰电流与Zr(Ⅳ )浓度为 6 .0× 10 -9～ 2 .0× 10 -6mol/L呈线性而测定Zr;检出限为 3.0× 10 -9mol/L(S/N =3)。最佳测定条件为 :2 .0mol/LHCl、1.0× 10 -5mol/L桑色素 ;富集电位为 0V(vs .SCE) ;扫描速度为2 5 0mV/s。该法不需萃取分离 ,可直接用于岩石样品中Zr的测定 ,结果满意
The adsorption voltammetric behavior of Zr morin complex in the positive potential region of carbon paste electrode was studied. The second derivative sorption peak current at 0.74V was compared with Zr (Ⅳ) concentration of 6.0 × 10 - The linear range of 9-2.0 × 10 -6 mol / L was Zr. The detection limit was 3.0 × 10 -9 mol / L (S / N = 3). The optimum conditions were as follows: 2.0 mol / LHCl and 1.0 × 10 -5 mol / L morin. The enrichment potential was 0V (vs. SCE) and the scanning speed was 250 mV / s. The method does not require extractive separation and can be directly applied to the determination of Zr in rock samples with satisfactory results