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本文研究了新合成显色剂对乙氧基二溴偶氮胂光度法测定锆的反应条件。锆与试剂在１．３２ｍｏｌ·Ｌ－１的ＨＣｌ介质中显色，配合物吸收峰为６４０ｎｍ，摩尔吸光系数为５．１１×１０￣４Ｌ·ｍｏｌ￣（－１）ｃｍ￣（－１），配合物组成为１∶３（Ｍ∶Ｒ），线性范围０～３０μｇ／２５ｍＬ。考察共存离子干扰，多数离子允许量在１０ｍｇ以上，不需加入掩蔽剂或其它分离方法，该法就可直接对不含稀土的多种合金中锆进行测定。作者对铝合金进行反复加入回收试验，证明本法灵敏度高，准确度好，选择性强，不失为一种测定微量锆的好方法。
In this paper, the reaction conditions for the determination of zirconium with ethoxy dibromoarsenazo photometric method were studied. Zirconium and reagents were developed in 1.32mol·L-1 HCl medium, the absorption peak of the complex was 640nm, the molar absorptivity was 5.11 × 10-4L · mol -1 cm -1, The complex has a composition of 1: 3 (M: R) with a linear range of 0-30 μg / 25 mL. Investigate the coexistence of ion interference, the majority of ion allowance of 10mg or more, without the need to add masking agents or other separation methods, the method can be directly on rare earth-free zirconium in a variety of alloys were determined. The author repeatedly added aluminum alloy recycling test, prove that the law of high sensitivity, accuracy, selectivity, after all, a good method for the determination of trace zirconium.