锆——铬蓝黑R络合物吸附波研究

Study on Adsorptive Wave of Complex of Zirconium and Eriochrome Blue Black R

在0.02mol/L HNO_3～4.0×10^(-5)mol/L EBBR溶液中,Zr(Ⅳ)—EBBR络合物在单扫描示波极谱上有一灵敏的导数极谱波,Ep=-0.40V(VS.SCE)。Zr(Ⅳ)浓度在1.97×10^(-7)～3.95×10^(-6)mol/L范围内与导数波高成线性关系。回归方程y=0.081+8.84x,r=0.9993。试验表明,该极谱波属于络合物吸附波。方法用于测定矿石中微量锆,结果满意。

In 0. 02mol/L HNO_3—4.0×10^(-5) mol/L Eriochrome Blue Black R (EBBR) solution, a sensitive derivative wave of Zr(Ⅳ)—EBBR complex with a peak potential of —0. 40V (VS. SCE) has been obtained by using single sweep oscillopolarography. The change of peak height with concentration of Zr(Ⅳ) is linear over the range from 1. 97X 10^(-7)to 3. 95×10^(-6)mol/L. The regression equation is y=0. 081 + 8. 84x,r = 0. 9993. The mechanism of electrode reaction was studied by various methods. The wave has been proved to be an adsorptive complex wave . The method was successfully applied to the determination of microamounts of Zr(Ⅳ) in ores.