本文研究了铝(Ⅲ)与 3,5,7,2＇,4＇-五羟基黄烯酮(桑色素,Morin)在非离子宏面活性剂Tween 80存在下,pH3.4—4.4的HAC-NaAc介质中,Al(Ⅲ)与Morin形成稳定的黄绿色配合物,其最大吸收波长在423nm处,表观摩尔吸光系数为7.2×10~·mol~1·cm~1 ,配合物组成比用Al(Ⅲ):Morin=1:3,其表观不稳定常数为1.43×10~(17),Al(Ⅲ)浓度在0～15μg/25ml之间符合比尔定律.以硫脲、抗坏血酸和邻菲罗啉作掩蔽剂,测定了电镀废水中微量铝,结果满意. In this paper, the effects of aluminum (Ⅲ) and 3,5,7,2 ’, 4’-pentahydroxyketene (morin) in the presence of nonionic surfactant Tween 80 on the HAC In NaAc medium, Al (Ⅲ) and Morin form a stable yellow-green complex with the maximum absorption wavelength of 423 nm and an apparent molar absorptivity of 7.2 × 10 ~ mol ~ 1 · cm ~ 1. The complex composition ratio The Beer’s Law is obeyed by the Beer’s Law with Al (Ⅲ): Morin = 1: 3, the apparent instability constant is 1.43 × 10-17, and the concentration of Al (Ⅲ) is 0-15μg / Phenanthroline as a masking agent, determination of trace amounts of aluminum in the electroplating wastewater, the results are satisfactory.