掩蔽锆测定铪的方法很少报导。Cheng提出用H_2O_2掩蔽锆,用二甲酚橙测定铪。其后又有人用H_2O_2掩蔽锆,用檞皮素或铬天青S测定铪。这些方法的缺点是锆的干扰仍较严重,颜色不稳定等。有的文章对这种方法表示否定。根据锆铪水溶液状态等的研究成果,我们对H_2O_2与锆铪的作用机理等问题作了探讨。找出一个可允许数倍量锆存在的测定铪的较满意的条件。实验部分 (一)主要试剂 Methods of masking zirconium for the determination of hafnium are seldom reported. Cheng proposed the use of H_2O_2 to mask zirconium and hafnium with xylenol orange. Later, another person with H_2O_2 masking zirconium, with phlorothelin or chrome azure S determination of hafnium. The disadvantage of these methods is the zirconium interference is still more serious, color instability and so on. Some articles denied this method. According to the research results of zirconium hafnium aqueous solution and other conditions, we discussed the mechanism of H 2 O 2 and zirconium hafnium. Find a more satisfactory conditions for the determination of hafnium that allows several times the amount of zirconium present. Experimental part (a) the main reagent