【摘要】 依据锆 (IV)对 H2 O2 氧化木立口 花青褪色的催化行为 ,建立了测定痕量锆的催化动力学分析法。本法线性范围为0～ 110 ng/ml,检测限为 0 .4ng/ml。除 Cr( ) ,Cu2 + 和 Fe3+ 外 ,其余离子不影响测定。其干扰可用 EDTA和甘露醇掩蔽消除 ,也可将 Cr( )还原为 Cr( )而消除其影响。测定了锆青铜及合成样品中的锆 ,结果满意。更多还原

【Abstract】 A novel catalytic spectrophotometric procedure has been proposed for the determination of ultratrace zirconium. The calibration graph is linear within the range of 0 ng·ml -1 ~110 ng·ml -1 , and the detection limit is 0 4 ng·ml -1 Zr(Ⅳ). Most of foreign ions have no interfering effect except for Cu 2+ ,Fe 3+ and Cr(Ⅵ). Their interferences could be eliminated by EDTA masking and manitol, or by reducing Cr(Ⅵ) to Cr(Ⅲ). The procedure has been satisfactorily applied to the determination of zirconium in zirconium bronze and simulated samples.更多还原