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本文报道新光度试剂４－（邻苯二甲酰肼－５－三氮烯）偶氮苯的合成、纯化及结构鉴定，并研究了该试剂在表面活性剂吐温－８０存在下与铜（Ⅱ）的显色反应条件。在吐温－８０存在下于ｐＨ１１．５Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲介质中，铜（Ⅱ）与该试剂形成稳定的红色络合物，其最大吸收波长位于５２０ｎｍ，摩尔吸光系数为６．０×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，铜量在０～６μｇ／１０ｍＬ范围内符合比耳定律。用本文拟定的方法测定了铝合金中的铜，结果满意。
This paper reports the synthesis, purification and structural identification of a new photometric reagent 4- (phthaloylhydrazide-5-triazene) azobenzene. The effect of this reagent on the Ⅱ) color reaction conditions. Copper (Ⅱ) forms a stable red complex with this reagent in pH11.5Na2B4O7-NaOH buffer medium in the presence of Tween-80, the maximum absorption wavelength is at 520nm and the molar absorptivity is 6.0 × 104L · mol -1 · cm-1, and Beer’s law was obeyed in the range of 0 ~ 6μg / 10mL. The method proposed in this paper was used to determine the copper in the aluminum alloy with satisfactory results.