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研究了锆钼蓝杂多酸在碱性溶液中的极谱行为 ,提出了测定微量锆的极谱法新体系。在0.04mol/L盐酸及抗坏血酸溶液中 ,锆 (Ⅳ)与钼酸铵反应形成锆钼蓝杂多酸 ,在pH8.5～10.5的NH3-NH4Cl缓冲溶液中 ,于-1.18V产生灵敏的极谱波,导数波高与锆(Ⅳ)的质量浓度在0.005～0.3mg/L范围内呈线性关系。研究了极谱波性质 ,证明其为吸附波 ,方法已用于岩石样品中微量锆的测定。
The polarographic behavior of zirconium molybdate blue heteropoly acid in alkaline solution was studied. A new polarographic method for the determination of trace zirconium was proposed. In 0.04 mol / L hydrochloric acid and ascorbic acid solution, zirconium (Ⅳ) reacted with ammonium molybdate to form zirconium molybdate blue heteropolyacid. In NH3-NH4Cl buffer solution of pH8.5-10.5, a sensitive electrode Spectral wave, derivative wave height and zirconium (Ⅳ) mass concentration in the range of 0.005 ~ 0.3mg / L showed a linear relationship. The polarographic wave properties have been studied and proved to be adsorption waves. The method has been applied to the determination of trace zirconium in rock samples.